Deleting an Event or a Recurrence Template does not permanently delete it. Follow the steps below to restore a deleted event.
From the Events (single events) or Recurrence Templates (recurring events) page, click the filter icon to the right of the search field (applies to single events only).
Select "Only deleted events" from the Deleted Events drop-down menu. If desired, use the other filter options to help refine your results.
Click the Apply Filters button.
Locate the desired event from the results that appear, click the ellipsis (...) button to the right of the event, and select "Undelete Event" (or "Undelete Template" if restoring a Recurrence Template) from the menu that appears.
Restoring a deleted event restores any registrations and/or reservations associated with the event. However, restoring a deleted Recurrence Template does not restore any future instances that may have been previously created prior to deleting the template. Future instances cannot be restored and must be recreated.