diff --git a/lib/pangea/course_plans/course_activities/activity_summaries_provider.dart b/lib/pangea/course_plans/course_activities/activity_summaries_provider.dart
index 0fdef8f17..91e4f5544 100644
--- a/lib/pangea/course_plans/course_activities/activity_summaries_provider.dart
+++ b/lib/pangea/course_plans/course_activities/activity_summaries_provider.dart
@@ -35,8 +35,10 @@ mixin ActivitySummariesProvider<T extends StatefulWidget> on State<T> {
         continue;
       }
 
-      final isOpen = summary.activityRoles.roles.length <
-          summary.activityPlan.req.numberOfParticipants;
+      final isOpen =
+          !summary.activityRoles.roles.values.any((r) => r.isArchived) &&
+              (summary.activityRoles.roles.length <
+                  summary.activityPlan.req.numberOfParticipants);
 
       if (isOpen) {
         sessions.add(roomId);