An Arizona State spokesperson confirmed to ESPN.com that Marshall has signed the paperwork to play for the Sun Devils next season.
Marshall averaged 15.3 points per game last season, and his initial plan was to bypass his senior season and play overseas. However, the 6-foot-3 wing had a change of heart and has decided to play his final season with coach Herb Sendek and the Sun Devils.
Marshall, who will graduate next month and be able to play this season, visited both Arizona State and Florida State and should help ease the blow of Gordon's departure to Indiana this past offseason.
Marshall led Penn State in 3-pointers (59) and steals (45) this past season.