The NFL wouldn't confirm why Charles was suspended. He was involved in an April 2014 road rage incident that occurred when he was a member of the Cincinnati Bengals. He was sentenced to a two-year diversion period in Kentucky in February after reportedly being accused of pointing a gun at another driver who made an obscene gesture at him.
Charles, a fourth-year pro, will be suspended for the first game of the 2015 season without pay. But first he has to earn a spot on the Saints' roster.
Charles (6-foot-3, 254 pounds) joined the Saints' practice squad last year. He is currently battling veteran Kevin Brock and undrafted rookie Jack Tabb for a roster spot behind veterans Benjamin Watson and Josh Hill.
Charles, who began his career as a fourth-round draft pick in Cincinnati in 2012, has nine career receptions for 109 yards in 29 games played.
Charles' suspension was first reported by the NFL Network.