diff --git a/public/app/features/alerting/unified/api/featureDiscoveryApi.ts b/public/app/features/alerting/unified/api/featureDiscoveryApi.ts
index a0d40e6c874..b6d8c812163 100644
--- a/public/app/features/alerting/unified/api/featureDiscoveryApi.ts
+++ b/public/app/features/alerting/unified/api/featureDiscoveryApi.ts
@@ -40,7 +40,7 @@ export const featureDiscoveryApi = alertingApi.injectEndpoints({
       queryFn: async (rulesSourceIdentifier) => {
         const dataSourceUID = getDataSourceUID(rulesSourceIdentifier);
         if (!dataSourceUID) {
-          return { error: new Error(`Unable to find data source for ${rulesSourceIdentifier}`) };
+          return { error: new Error(`Unable to find data source for ${JSON.stringify(rulesSourceIdentifier)}`) };
         }
 
         if (dataSourceUID === GrafanaRulesSourceSymbol) {
diff --git a/public/app/features/alerting/unified/hooks/useIsRuleEditable.test.tsx b/public/app/features/alerting/unified/hooks/useIsRuleEditable.test.tsx
index f8e85ba76d6..36d2d6f06d1 100644
--- a/public/app/features/alerting/unified/hooks/useIsRuleEditable.test.tsx
+++ b/public/app/features/alerting/unified/hooks/useIsRuleEditable.test.tsx
@@ -10,6 +10,7 @@ import { AccessControlAction, FolderDTO } from 'app/types';
 import { setupMswServer } from '../mockApi';
 import { mockDataSource, mockFolder, mockRulerAlertingRule, mockRulerGrafanaRule } from '../mocks';
 import { setupDataSources } from '../testSetup/datasources';
+import { GRAFANA_RULES_SOURCE_NAME } from '../utils/datasource';
 
 import { useFolder } from './useFolder';
 import { useIsRuleEditable } from './useIsRuleEditable';
@@ -56,7 +57,9 @@ describe('useIsRuleEditable', () => {
 
         const wrapper = getProviderWrapper();
 
-        const { result } = renderHook(() => useIsRuleEditable('grafana', mockRulerGrafanaRule()), { wrapper });
+        const { result } = renderHook(() => useIsRuleEditable(GRAFANA_RULES_SOURCE_NAME, mockRulerGrafanaRule()), {
+          wrapper,
+        });
 
         await waitFor(() => expect(result.current.loading).toBe(false));
         expect(result.current.isRemovable).toBe(true);
diff --git a/public/app/features/alerting/unified/hooks/useIsRuleEditable.ts b/public/app/features/alerting/unified/hooks/useIsRuleEditable.ts
index 50ca91b8188..017e008c02c 100644
--- a/public/app/features/alerting/unified/hooks/useIsRuleEditable.ts
+++ b/public/app/features/alerting/unified/hooks/useIsRuleEditable.ts
@@ -3,7 +3,6 @@ import { RulerRuleDTO } from 'app/types/unified-alerting-dto';
 
 import { featureDiscoveryApi } from '../api/featureDiscoveryApi';
 import { getRulesPermissions } from '../utils/access-control';
-import { getDatasourceAPIUid } from '../utils/datasource';
 import { isGrafanaRulerRule } from '../utils/rules';
 
 import { useFolder } from './useFolder';
@@ -13,11 +12,16 @@ interface ResultBag {
   isEditable?: boolean;
   isRemovable?: boolean;
   loading: boolean;
+  error?: unknown;
 }
 
 export function useIsRuleEditable(rulesSourceName: string, rule?: RulerRuleDTO): ResultBag {
-  const { currentData: dsFeatures, isLoading } = featureDiscoveryApi.endpoints.discoverDsFeatures.useQuery({
-    uid: getDatasourceAPIUid(rulesSourceName),
+  const {
+    currentData: dsFeatures,
+    isLoading,
+    error,
+  } = featureDiscoveryApi.endpoints.discoverDsFeatures.useQuery({
+    rulesSourceName,
   });
 
   const folderUID = rule && isGrafanaRulerRule(rule) ? rule.grafana_alert.namespace_uid : undefined;
@@ -25,6 +29,17 @@ export function useIsRuleEditable(rulesSourceName: string, rule?: RulerRuleDTO):
   const rulePermission = getRulesPermissions(rulesSourceName);
   const { folder, loading } = useFolder(folderUID);
 
+  // handle discovery and data source errors
+  if (error) {
+    return {
+      isEditable: false,
+      isRemovable: false,
+      loading: false,
+      isRulerAvailable: false,
+      error,
+    };
+  }
+
   if (!rule) {
     return { isEditable: false, isRemovable: false, loading: false };
   }
diff --git a/public/app/features/alerting/unified/mocks.ts b/public/app/features/alerting/unified/mocks.ts
index 353a9531b9d..8e2701e0e04 100644
--- a/public/app/features/alerting/unified/mocks.ts
+++ b/public/app/features/alerting/unified/mocks.ts
@@ -57,6 +57,7 @@ import {
 import { DashboardSearchItem, DashboardSearchItemType } from '../../search/types';
 
 import { SimpleConditionIdentifier } from './components/rule-editor/query-and-alert-condition/SimpleCondition';
+import { GRAFANA_RULES_SOURCE_NAME } from './utils/datasource';
 import { parsePromQLStyleMatcherLooseSafe } from './utils/matchers';
 
 let nextDataSourceId = 1;
@@ -686,7 +687,7 @@ export function getGrafanaRule(override?: Partial<CombinedRule>, rulerOverride?:
     namespace: {
       groups: [],
       name: 'Grafana',
-      rulesSource: 'grafana',
+      rulesSource: GRAFANA_RULES_SOURCE_NAME,
     },
     rulerRule: mockGrafanaRulerRule(rulerOverride),
     ...override,
diff --git a/public/app/features/alerting/unified/rule-editor/ExistingRuleEditor.tsx b/public/app/features/alerting/unified/rule-editor/ExistingRuleEditor.tsx
index 00641db1eda..3ca54fdd9aa 100644
--- a/public/app/features/alerting/unified/rule-editor/ExistingRuleEditor.tsx
+++ b/public/app/features/alerting/unified/rule-editor/ExistingRuleEditor.tsx
@@ -17,17 +17,30 @@ interface ExistingRuleEditorProps {
 }
 
 export function ExistingRuleEditor({ identifier, prefill }: ExistingRuleEditorProps) {
-  const {
-    loading: loadingAlertRule,
-    result: ruleWithLocation,
-    error,
-  } = useRuleWithLocation({ ruleIdentifier: identifier });
   const [queryParams] = useQueryParams();
   const isManualRestore = Boolean(queryParams.isManualRestore);
 
-  const ruleSourceName = ruleId.ruleIdentifierToRuleSourceName(identifier);
+  const {
+    loading: loadingAlertRule,
+    result: ruleWithLocation,
+    error: fetchRuleError,
+  } = useRuleWithLocation({ ruleIdentifier: identifier });
 
-  const { isEditable, loading: loadingEditable } = useIsRuleEditable(ruleSourceName, ruleWithLocation?.rule);
+  const ruleSourceName = ruleId.ruleIdentifierToRuleSourceName(identifier);
+  const {
+    isEditable,
+    loading: loadingEditable,
+    error: errorEditable,
+  } = useIsRuleEditable(ruleSourceName, ruleWithLocation?.rule);
+
+  // error handling for fetching rule and rule RBAC
+  if (fetchRuleError || errorEditable) {
+    return (
+      <Alert severity="error" title="Failed to load rule">
+        {stringifyErrorLike(errorEditable ?? fetchRuleError)}
+      </Alert>
+    );
+  }
 
   const loading = loadingAlertRule || loadingEditable;
 
@@ -35,14 +48,6 @@ export function ExistingRuleEditor({ identifier, prefill }: ExistingRuleEditorPr
     return <LoadingPlaceholder text="Loading rule..." />;
   }
 
-  if (error) {
-    return (
-      <Alert severity="error" title="Failed to load rule">
-        {stringifyErrorLike(error)}
-      </Alert>
-    );
-  }
-
   if (!ruleWithLocation && !loading) {
     return <AlertWarning title="Rule not found">Sorry! This rule does not exist.</AlertWarning>;
   }
diff --git a/public/app/features/alerting/unified/rule-editor/RuleEditorExisting.test.tsx b/public/app/features/alerting/unified/rule-editor/RuleEditorExisting.test.tsx
index 1781ab75d2b..8f6538f60b7 100644
--- a/public/app/features/alerting/unified/rule-editor/RuleEditorExisting.test.tsx
+++ b/public/app/features/alerting/unified/rule-editor/RuleEditorExisting.test.tsx
@@ -4,7 +4,6 @@ import { render, screen } from 'test/test-utils';
 
 import { contextSrv } from 'app/core/services/context_srv';
 import { setFolderResponse } from 'app/features/alerting/unified/mocks/server/configure';
-import { MIMIR_DATASOURCE_UID } from 'app/features/alerting/unified/mocks/server/constants';
 import { captureRequests } from 'app/features/alerting/unified/mocks/server/events';
 import { DashboardSearchItemType } from 'app/features/search/types';
 import { AccessControlAction } from 'app/types';
@@ -12,6 +11,7 @@ import { AccessControlAction } from 'app/types';
 import { setupMswServer } from '../mockApi';
 import { grantUserPermissions, mockDataSource, mockFolder } from '../mocks';
 import { grafanaRulerRule } from '../mocks/grafanaRulerApi';
+import { MIMIR_DATASOURCE_UID } from '../mocks/server/constants';
 import { setupDataSources } from '../testSetup/datasources';
 import { Annotation } from '../utils/constants';
 
@@ -151,3 +151,15 @@ describe('RuleEditor grafana managed rules', () => {
     expect(postBody.interval).toBe('12m');
   });
 });
+
+describe('Data source managed rules', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+    grantUserPermissions([AccessControlAction.AlertingRuleExternalRead, AccessControlAction.AlertingRuleExternalWrite]);
+  });
+
+  it('should show an error if the data source does not exist', async () => {
+    renderRuleEditor('cri%24grafana-cloudd%24delete me%24delete me 3%24recording_rule_delete_2%24-476183141');
+    expect(await screen.findByText(/unable to find data source/i)).toBeInTheDocument();
+  });
+});