diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2e12fcb6..e89d912fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
 * User receives an error when searching for an item in the Inventory app. Fixes UIIN-2634.
 * Create new instance success toast no longer shows the instance HRID. Fixes UIIN-2635.
 * Optimistic locking message not working for instances in non-consortial tenant. Fixes UIIN-2628.
+* Add immediate warning message when a local instance is shared. Refs UIIN-2617.
 
 ## [10.0.0](https://github.com/folio-org/ui-inventory/tree/v10.0.0) (2023-10-13)
 [Full Changelog](https://github.com/folio-org/ui-inventory/compare/v9.4.12...v10.0.0)
diff --git a/src/Instance/InstanceDetails/InstanceDetails.js b/src/Instance/InstanceDetails/InstanceDetails.js
index 08833cacd..5f41c0c18 100644
--- a/src/Instance/InstanceDetails/InstanceDetails.js
+++ b/src/Instance/InstanceDetails/InstanceDetails.js
@@ -72,6 +72,7 @@ const InstanceDetails = forwardRef(({
   userTenantPermissions,
   isShared,
   isLoading,
+  isInstanceSharing,
   ...rest
 }, ref) => {
   const intl = useIntl();
@@ -85,12 +86,15 @@ const InstanceDetails = forwardRef(({
   const accordionState = useMemo(() => getAccordionState(instance, accordions), [instance]);
   const [helperApp, setHelperApp] = useState();
 
+  const isBasicPane = isInstanceSharing || isLoading;
   const tags = instance?.tags?.tagList;
   const isUserInCentralTenant = checkIfUserInCentralTenant(stripes);
 
   const canCreateHoldings = stripes.hasPerm('ui-inventory.holdings.create');
 
   const detailsLastMenu = useMemo(() => {
+    if (isBasicPane) return null;
+
     return (
       <PaneMenu>
         {
@@ -106,31 +110,15 @@ const InstanceDetails = forwardRef(({
         }
       </PaneMenu>
     );
-  }, [tagsEnabled, tags, intl]);
-
-  if (isLoading) {
-    return (
-      <Pane
-        id="pane-instancedetails"
-        defaultWidth="fill"
-        paneTitle={intl.formatMessage({ id: 'ui-inventory.edit' })}
-        appIcon={<AppIcon app="inventory" iconKey="instance" />}
-        dismissible
-        onClose={onClose}
-      >
-        <div style={{ paddingTop: '1rem' }}>
-          <Icon
-            icon="spinner-ellipsis"
-            width="100px"
-          />
-        </div>
-      </Pane>
-    );
-  }
-
-  const isConsortialHoldingsVisible = instance?.shared || isInstanceShadowCopy(instance?.source);
+  }, [isBasicPane, tagsEnabled, tags, intl]);
+  const detailsActionMenu = useMemo(
+    () => (isBasicPane ? null : actionMenu),
+    [isBasicPane, actionMenu],
+  );
 
   const renderPaneTitle = () => {
+    if (isBasicPane) return intl.formatMessage({ id: 'ui-inventory.edit' });
+
     const isInstanceShared = Boolean(isShared || isInstanceShadowCopy(instance?.source));
 
     return (
@@ -146,6 +134,8 @@ const InstanceDetails = forwardRef(({
   };
 
   const renderPaneSubtitle = () => {
+    if (isBasicPane) return null;
+
     return (
       <FormattedMessage
         id="ui-inventory.instanceRecordSubtitle"
@@ -157,20 +147,32 @@ const InstanceDetails = forwardRef(({
     );
   };
 
-  return (
-    <>
-      <Pane
-        {...rest}
-        data-test-instance-details
-        appIcon={<AppIcon app="inventory" iconKey="instance" />}
-        paneTitle={renderPaneTitle()}
-        paneSub={renderPaneSubtitle()}
-        dismissible
-        onClose={onClose}
-        actionMenu={actionMenu}
-        defaultWidth="fill"
-        lastMenu={detailsLastMenu}
-      >
+  const renderDetails = () => {
+    if (isInstanceSharing) {
+      return (
+        <div>
+          <MessageBanner show={Boolean(isInstanceSharing)} type="warning">
+            <FormattedMessage id="ui-inventory.warning.instance.sharingLocalInstance" />
+          </MessageBanner>
+        </div>
+      );
+    }
+
+    if (isLoading) {
+      return (
+        <div>
+          <Icon
+            icon="spinner-ellipsis"
+            width="100px"
+          />
+        </div>
+      );
+    }
+
+    const isConsortialHoldingsVisible = instance?.shared || isInstanceShadowCopy(instance?.source);
+
+    return (
+      <>
         <TitleManager record={instance.title} />
 
         <AccordionStatus ref={ref}>
@@ -291,6 +293,25 @@ const InstanceDetails = forwardRef(({
             />
           </AccordionSet>
         </AccordionStatus>
+      </>
+    );
+  };
+
+  return (
+    <>
+      <Pane
+        {...rest}
+        data-test-instance-details
+        appIcon={<AppIcon app="inventory" iconKey="instance" />}
+        paneTitle={renderPaneTitle()}
+        paneSub={renderPaneSubtitle()}
+        actionMenu={detailsActionMenu}
+        lastMenu={detailsLastMenu}
+        dismissible
+        onClose={onClose}
+        defaultWidth="fill"
+      >
+        {renderDetails()}
       </Pane>
       { helperApp && <HelperApp appName={helperApp} onClose={setHelperApp} />}
     </>
@@ -306,6 +327,7 @@ InstanceDetails.propTypes = {
   tagsEnabled: PropTypes.bool,
   userTenantPermissions: PropTypes.arrayOf(PropTypes.object),
   isLoading: PropTypes.bool,
+  isInstanceSharing: PropTypes.bool,
   isShared: PropTypes.bool,
 };
 
@@ -313,6 +335,7 @@ InstanceDetails.defaultProps = {
   instance: {},
   tagsEnabled: false,
   isLoading: false,
+  isInstanceSharing: false,
   isShared: false,
 };
 
diff --git a/src/Instance/InstanceDetails/InstanceDetails.test.js b/src/Instance/InstanceDetails/InstanceDetails.test.js
index daf483dcd..e8cd22f7e 100644
--- a/src/Instance/InstanceDetails/InstanceDetails.test.js
+++ b/src/Instance/InstanceDetails/InstanceDetails.test.js
@@ -112,6 +112,13 @@ describe('InstanceDetails', () => {
     expect(screen.getByText('Instance relationship (analytics and bound-with)')).toBeInTheDocument();
   });
 
+  it('should show a correct Warning message banner when instance sharing is in progress', () => {
+    renderInstanceDetails({ isInstanceSharing: true });
+
+    expect(screen.getByText('Sharing this local instance will take a few moments.' +
+      ' A success message and updated details will be displayed upon completion.')).toBeInTheDocument();
+  });
+
   it('should show a correct Warning message banner when staff suppressed', () => {
     const staffSuppressedInstance = {
       ...instance,
diff --git a/src/ViewInstance.js b/src/ViewInstance.js
index beeed1f4d..f687c918a 100644
--- a/src/ViewInstance.js
+++ b/src/ViewInstance.js
@@ -176,7 +176,7 @@ class ViewInstance extends React.Component {
     this.log = logger.log.bind(logger);
 
     this.state = {
-      isLoading: false,
+      isInstanceSharing: false,
       marcRecord: null,
       findInstancePluginOpened: false,
       isItemsMovement: false,
@@ -493,14 +493,14 @@ class ViewInstance extends React.Component {
         this.setState({
           isUnlinkAuthoritiesModalOpen: false,
           isShareLocalInstanceModalOpen: false,
-          isLoading: true
+          isInstanceSharing: true,
         });
 
         await this.waitForInstanceSharingComplete({ sourceTenantId, instanceIdentifier, instanceTitle });
       })
       .then(async () => {
         await this.props.refetchInstance();
-        this.setState({ isLoading: false });
+        this.setState({ isInstanceSharing: false });
         this.calloutRef.current.sendCallout({
           type: 'success',
           message: <FormattedMessage id="ui-inventory.shareLocalInstance.toast.successful" values={{ instanceTitle }} />,
@@ -883,8 +883,12 @@ class ViewInstance extends React.Component {
       canUseSingleRecordImport,
       isCentralTenantPermissionsLoading,
       isShared,
+      isLoading,
     } = this.props;
-    const { linkedAuthoritiesLength } = this.state;
+    const {
+      linkedAuthoritiesLength,
+      isInstanceSharing,
+    } = this.state;
     const ci = makeConnectedInstance(this.props, stripes.logger);
     const instance = ci.instance();
 
@@ -918,7 +922,7 @@ class ViewInstance extends React.Component {
         handler: (e) => collapseAllSections(e, this.accordionStatusRef),
       },
     ];
-    const isInstanceLoading = this.state.isLoading || !instance || isCentralTenantPermissionsLoading;
+    const isInstanceLoading = isLoading || !instance || isCentralTenantPermissionsLoading;
     const keyInStorageToHoldingsAccsState = ['holdings'];
 
     return (
@@ -938,6 +942,7 @@ class ViewInstance extends React.Component {
               ref={this.accordionStatusRef}
               userTenantPermissions={this.state.userTenantPermissions}
               isLoading={isInstanceLoading}
+              isInstanceSharing={isInstanceSharing}
               isShared={isShared}
             >
               {
@@ -1093,6 +1098,7 @@ ViewInstance.propTypes = {
   }).isRequired,
   tagsEnabled: PropTypes.bool,
   updateLocation: PropTypes.func.isRequired,
+  isLoading: PropTypes.bool,
 };
 
 export default flowRight(
diff --git a/src/ViewInstanceWrapper.js b/src/ViewInstanceWrapper.js
index 2fb8b2caa..170ed5ef1 100644
--- a/src/ViewInstanceWrapper.js
+++ b/src/ViewInstanceWrapper.js
@@ -17,7 +17,7 @@ const ViewInstanceWrapper = (props) => {
   const userId = stripes?.user?.user?.id;
   const centralTenantId = stripes.user.user?.consortium?.centralTenantId;
   const consortiumId = stripes.user.user?.consortium?.id;
-  const { instance, refetch } = useInstance(id);
+  const { instance, isLoading, refetch } = useInstance(id);
 
   const isShared = Boolean(instance?.shared);
   const tenantId = instance?.tenantId ?? stripes.okapi.tenant;
@@ -41,6 +41,7 @@ const ViewInstanceWrapper = (props) => {
       consortiumId={consortiumId}
       refetchInstance={refetch}
       selectedInstance={instance}
+      isLoading={isLoading}
       centralTenantPermissions={centralTenantPermissions}
       isCentralTenantPermissionsLoading={isCentralTenantPermissionsLoading}
     />
diff --git a/src/common/hooks/useInstance.js b/src/common/hooks/useInstance.js
index b60cfc3bc..686408d17 100644
--- a/src/common/hooks/useInstance.js
+++ b/src/common/hooks/useInstance.js
@@ -9,7 +9,7 @@ const useInstance = (id) => {
   const instanceTenantId = _instance?.tenantId;
   const isShared = _instance?.shared;
 
-  const { isLoading, instance: data, refetch } = useInstanceQuery(
+  const { isLoading: isInstanceLoading, instance: data, refetch } = useInstanceQuery(
     id,
     { tenantId: instanceTenantId },
     { enabled: Boolean(id && !isSearchInstanceByIdLoading) }
@@ -23,6 +23,10 @@ const useInstance = (id) => {
     }),
     [data, isShared, instanceTenantId],
   );
+  const isLoading = useMemo(
+    () => isSearchInstanceByIdLoading || isInstanceLoading,
+    [isSearchInstanceByIdLoading, isInstanceLoading],
+  );
 
   return {
     instance,
diff --git a/translations/ui-inventory/en.json b/translations/ui-inventory/en.json
index afa026c97..91e1ac580 100644
--- a/translations/ui-inventory/en.json
+++ b/translations/ui-inventory/en.json
@@ -798,6 +798,7 @@
   "warning.instance.suppressedFromDiscovery": "Warning: Instance is marked suppressed from discovery",
   "warning.instance.staffSuppressed": "Warning: Instance is marked staff suppressed",
   "warning.instance.suppressedFromDiscoveryAndStaffSuppressed": "Warning: Instance is marked suppressed from discovery and staff suppressed",
+  "warning.instance.sharingLocalInstance": "Sharing this local instance will take a few moments. A success message and updated details will be displayed upon completion.",
   "warning.holdingsRecord.suppressedFromDiscovery": "Warning: Holdings is marked suppressed from discovery",
   "warning.item.suppressedFromDiscovery": "Warning: Item is marked suppressed from discovery",
   "discoverySuppressed": "Suppressed from discovery",