You can recover the most recent version of a deleted rule if the ruleset version is unlocked. This technique provides a form of undelete, or undo, for the delete operation. You can recover a deleted rule immediately, a rule deleted earlier today, or you can use the Recent Actions landing page to locate and recover the rule.
Note: Recover and restore are different operations. Restoring a rule performs a rollback to a previous version selected from the History Details tab of the rule form.