You can only delete standard campaigns in Draft status and drip campaigns in Draft or Scheduled status. If necessary, edit a standard campaign or pre-built campaign to click the Cancel Scheduled Delivery button (which resets its status to Draft) before deleting it. You can only delete a campaign if none of its editions have been scheduled or sent, and you must delete all editions before deleting the campaign itself. You can delete individual editions as long as they have a status of Draft. You cannot reverse deletions.
You can hide Active or Completed campaigns that you no longer need to access regularly. Hiding campaigns removes them from the default Campaigns list, but you can display them by selecting the Show Hidden checkbox. Click the Show link to restore a hidden campaign to the default list. Hiding a campaign does not affect any scheduled distributions.
You can also delete an unsent, unscheduled standard or pre-built campaign using the Delete Campaign link on its Campaign Detail page. Remember that to delete an edition of a recurring standard campaign, you must access that edition's Campaign Detail page.