Press Ctrl + Z immediately after deleting the sheet
Click the Undo button on the Quick Access Toolbar
Reopen the workbook and restore it from a previous saved version
Check OneDrive or SharePoint version history and restore an earlier version
Use File > Info > Version History if the file is stored in Microsoft 365
Recover the workbook from AutoRecover if Excel closed unexpectedly
Restore the file from a backup copy if one exists
Check the Recycle Bin if the workbook file itself was deleted
If the sheet was deleted in a shared workbook, ask the owner to restore a prior version
If no backup or version history exists, recreate the sheet manually