Accidental deletion of a Test Folder (TF####) results in the removal of all nested Test Cases from their associated Test Sets. Revision history shows results and test cases "Moved to Recycle Bin" and "removed from TEST SET"
Rally SAAS
Rally distinguishes between core objects and container objects. Test Folders and Test Cases are core objects that reside in the Recycle Bin upon deletion. Test Sets are container objects that are permanently deleted. When a Test Folder is deleted, the association between its child Test Cases and any existing Test Sets is broken immediately.
Restore the core objects and manually rebuild the container associations.
Note: If any Work Item is permanently deleted from the Recycle Bin, it remains restorable for 21 days. Restoration is not possible after this period.