diff --git a/change/@fluentui-react-popover-cd0f51c6-92c0-4de4-917e-df1a53233d3b.json b/change/@fluentui-react-popover-cd0f51c6-92c0-4de4-917e-df1a53233d3b.json
new file mode 100644
index 0000000000000..f7a024ecc90bd
--- /dev/null
+++ b/change/@fluentui-react-popover-cd0f51c6-92c0-4de4-917e-df1a53233d3b.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "fix: preventDefault when closing the popover surface to avoid closing parent dialogs.",
+  "packageName": "@fluentui/react-popover",
+  "email": "esteban.230@hotmail.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/react-components/react-popover/src/components/PopoverSurface/usePopoverSurface.ts b/packages/react-components/react-popover/src/components/PopoverSurface/usePopoverSurface.ts
index 0ad5860660b3f..425f6fec93691 100644
--- a/packages/react-components/react-popover/src/components/PopoverSurface/usePopoverSurface.ts
+++ b/packages/react-components/react-popover/src/components/PopoverSurface/usePopoverSurface.ts
@@ -78,6 +78,7 @@ export const usePopoverSurface_unstable = (
     // only close if the event happened inside the current popover
     // If using a stack of inline popovers, the user should call `stopPropagation` to avoid dismissing the entire stack
     if (e.key === 'Escape' && contentRef.current?.contains(e.target as HTMLDivElement)) {
+      e.preventDefault();
       setOpen(e, false);
     }