It depends on how the asset was deleted and how recently.
Remove from a kit
If you removed an asset from a kit rather than deleting it, the assert will still be in your library.
Only Admins and Content Managers can access the Library.
Drag the asset block from the insert panel
Select "From Library
Use filters to find the asset you want to add back.
Choose "Add" to restore it to the kit.
Permanently deleted assets
If an asset was permanently deleted, recovery options are limited. Permanent deletion removes the asset from all kits and the library.
Recent deletions - Contact support as soon as possible. Depending on timing, we may be able to help recover recently deleted files from backups.
Older deletions - Files that have been permanently deleted for an extended period cannot be recovered.
Best practices
Use the library as an archive - When in doubt, removing content from kits but leaving it in the library is a safe approach. You can always delete them later if you're sure.
Use caution with bulk actions - Double-check before performing bulk delete operations.