The Gators announced Friday that the freshman, one of the state's top recruits in February, will not be medically cleared to return. Florida did not provide details about Robinson's diagnosis.
Florida spokesman Steve McClain says "after a thorough evaluation by doctors across the country and our medical staff, it has been determined that James Robinson will not be medically cleared to play football at the University of Florida."
The Gators initially ruled Robinson out indefinitely in early September, saying an echocardiogram revealed a potential issue. Robinson traveled to see heart specialists, and Florida said any results wouldn't be available until November.
McClain adds that "the University Athletic Association has offered their support to James and his family during this very difficult time."
The 6-foot-4 Robinson was suspended for the season opener against Michigan after an Aug. 21 marijuana possession citation. He also was cited for marijuana possession during his official visit to Ohio State in January.