The duo arrived at Soham towards the end of December with Carden joining from Cambridge City and Hall from St Neots Town.
Carden, who made thirteen Soham appearances, has returned to Histon, where he progressed through their youth academy before signing for St Ives Town at the beginning of the season.
Hall, who played ten games for the Greens, has returned to Godmanchester Rovers, where he was part of the squad which finished as Eastern Counties runners-up last season, before joining St Neots over the summer.