diff --git a/public/app/features/alerting/unified/components/rule-editor/FolderAndGroup.tsx b/public/app/features/alerting/unified/components/rule-editor/FolderAndGroup.tsx
index 2a078322785..6d1f4202942 100644
--- a/public/app/features/alerting/unified/components/rule-editor/FolderAndGroup.tsx
+++ b/public/app/features/alerting/unified/components/rule-editor/FolderAndGroup.tsx
@@ -169,6 +169,7 @@ export function FolderAndGroup({ initialFolder }: FolderAndGroupProps) {
                 inputId="group"
                 key={`my_unique_select_key__${selectedGroup?.title ?? ''}`}
                 {...field}
+                invalid={Boolean(folder) && !selectedGroup.value}
                 loadOptions={debouncedSearch}
                 loadingMessage={'Loading groups...'}
                 defaultOptions={groupOptions}