diff --git a/apps/web/src/components/Sidebar.logic.test.ts b/apps/web/src/components/Sidebar.logic.test.ts
index 669c805492bc..3e2e8be2ce18 100644
--- a/apps/web/src/components/Sidebar.logic.test.ts
+++ b/apps/web/src/components/Sidebar.logic.test.ts
@@ -624,10 +624,45 @@ describe("getFallbackThreadIdAfterDelete", () => {
       deletedThreadId: ThreadId.make("thread-active"),
       deletedThreadIds: new Set([ThreadId.make("thread-active"), ThreadId.make("thread-newest")]),
       sortOrder: "created_at",
+      now: "2026-03-09T10:10:00.000Z",
     });
 
     expect(fallbackThreadId).toBe(ThreadId.make("thread-next"));
   });
+
+  it.each([
+    [
+      "snoozed",
+      { snoozedUntil: "2099-01-01T00:00:00.000Z", snoozedAt: "2026-03-09T10:06:00.000Z" },
+    ],
+    ["settled", { settledOverride: "settled", settledAt: "2026-03-09T10:06:00.000Z" }],
+  ] as const)("skips a %s thread parked on its shelf", (_state, parked) => {
+    const fallbackThreadId = getFallbackThreadIdAfterDelete({
+      threads: [
+        makeThread({
+          id: ThreadId.make("thread-visible"),
+          createdAt: "2026-03-09T10:01:00.000Z",
+          updatedAt: "2026-03-09T10:01:00.000Z",
+        }),
+        makeThread({
+          id: ThreadId.make("thread-parked"),
+          createdAt: "2026-03-09T10:02:00.000Z",
+          updatedAt: "2026-03-09T10:06:00.000Z",
+          ...parked,
+        }),
+        makeThread({
+          id: ThreadId.make("thread-active"),
+          createdAt: "2026-03-09T10:03:00.000Z",
+          updatedAt: "2026-03-09T10:03:00.000Z",
+        }),
+      ],
+      deletedThreadId: ThreadId.make("thread-active"),
+      sortOrder: "created_at",
+      now: "2026-03-09T10:10:00.000Z",
+    });
+
+    expect(fallbackThreadId).toBe(ThreadId.make("thread-visible"));
+  });
 });
 
 describe("sortScopedProjectsForSidebar", () => {
diff --git a/apps/web/src/components/Sidebar.logic.ts b/apps/web/src/components/Sidebar.logic.ts
index 55cf694c2b79..c20789e2a916 100644
--- a/apps/web/src/components/Sidebar.logic.ts
+++ b/apps/web/src/components/Sidebar.logic.ts
@@ -1211,14 +1211,17 @@ export function resolveThreadStatusPill(input: {
 }
 
 export function getFallbackThreadIdAfterDelete<
-  T extends Pick<Thread, "id" | "projectId" | "createdAt" | "updatedAt"> & ThreadSortInput,
+  T extends Pick<Thread, "id" | "projectId" | "createdAt" | "updatedAt" | "settledOverride"> &
+    ThreadSortInput &
+    ThreadSnoozeShell,
 >(input: {
   threads: readonly T[];
   deletedThreadId: T["id"];
   sortOrder: SidebarThreadSortOrder;
+  now: string;
   deletedThreadIds?: ReadonlySet<T["id"]>;
 }): T["id"] | null {
-  const { deletedThreadId, deletedThreadIds, sortOrder, threads } = input;
+  const { deletedThreadId, deletedThreadIds, sortOrder, now, threads } = input;
   const deletedThread = threads.find((thread) => thread.id === deletedThreadId);
   if (!deletedThread) {
     return null;
@@ -1230,7 +1233,9 @@ export function getFallbackThreadIdAfterDelete<
         (thread) =>
           thread.projectId === deletedThread.projectId &&
           thread.id !== deletedThreadId &&
-          !deletedThreadIds?.has(thread.id),
+          !deletedThreadIds?.has(thread.id) &&
+          thread.settledOverride !== "settled" &&
+          !effectiveSnoozed(thread, { now }),
       ),
       sortOrder,
     )[0]?.id ?? null
diff --git a/apps/web/src/hooks/useThreadActions.ts b/apps/web/src/hooks/useThreadActions.ts
index e5eedffc1669..904b94ebfc5c 100644
--- a/apps/web/src/hooks/useThreadActions.ts
+++ b/apps/web/src/hooks/useThreadActions.ts
@@ -554,6 +554,7 @@ export function useThreadActions() {
       deletedThreadId: threadRef.threadId,
       deletedThreadIds,
       sortOrder: sidebarThreadSortOrder,
+      now: new Date().toISOString(),
     });
     const deleteResult = await deleteThreadMutation({
       environmentId: threadRef.environmentId,