WXIII: Patlabor the Movie 3 (WXIIIパトレイバー the Movie 3, Wasted Thirteen Patoreibā the Movie 3) is a 2001 anime feature film chief directed and storyboarded by Fumihiko Takayama, directed by Takuji Endō, written by Miki Tori based on the concept by Headgear, animated by Madhouse and produced by Bandai Visual and Tohokushinsha.

The movie is a side story to Patlabor, and takes place in the movie timeline, between Patlabor 1 and 2. It is based on a part of the manga and has a similar premise to a story in the original OVA series. WXIII premiered out of competition during the Tokyo International Fantastic Film Festival, which had special screening on December 10, 2001 . WXIII's Japanese theatrical release took place on March 30, 2002 to coincide with the release of Minipato while North American screening started on January 10, 2003 , which was eventually followed by subsequent DVD releases to Europe and Oceania.

Source: Wikipedia