The 34-year-old Wicks has represented several clubs in North America's Major League Soccer as well as teams in Finland and Sweden during his 15-year career.
"He is devastated - football is his work and now he cannot practise it," Ove Sjoeblom, chairman of the Allsvenskan club from Sweden's fourth-largest city of Uppsala, told a news conference on Thursday.
"He's not being fired. It is rather a termination of a contract according to its terms," Sjoeblom added.
(Reporting by Philip O'Connor, editing by Ed Osmond)
