The drama series will end its run with its June 16 episode, which will now serve as series finale.
The Borgias, which stars Jeremy Irons as Pope Alexander VI, was originally planned to run four seasons to parallel the duration of its Showtime predecessor The Tudors.
In a statement, Showtime entertainment president David Nevins said, “It has been an honor to work with the great Neil Jordan and the incomparable Jeremy Irons on The Borgias. Neil has written nearly every episode of this series himself. His extraordinary storytelling combined with Jeremy’s fascinating portrayal of the infamous Pope Alexander VI, has made for truly outstanding television that will live on. I lootk forward to future collaborations.”