David Newkerk summed up the answer here; I'm quoting the relevant part below:
... if a node or other piece of data is deleted from Drupal, it is immediately and permanently deleted from the database - the only way to recover it would be from a backup of the database itself (or if there's no backup and its your own local server, possibly with undelete/recovery software). There isn't a recycle bin or other holding area when you tell Drupal to delete something - it asks whether you are really sure, and if you click yes, the data is deleted from the database.
Comments
No. Unfortunately.
David Newkerk summed up the answer here; I'm quoting the relevant part below: