Fellaini, Huth handed 3-match bans
The players were charged with violent conduct for an incident during Sunday's 1-1 Premier League draw.
Fellaini appeared to elbow Huth in the 21st minute of the game at Old Trafford after having his hair pulled by the German defender.
The incident was not seen by the match officials but the charge was brought after a panel of three former elite refereesviewed the video evidence and determined the players were guilty of a sending-off offence.
Both players had until Wednesday to reply to the charge, and it is not known yet if they did before the ban.
Leicester City have already been crowned Premier League champions ahead of their final two games of the season.
Manchester United, who are still chasing fourth place and a Champions League qualification spot, have three league games remaining.
The three-match ban leaves Fellaini eligible to play in the FA Cup final against Crystal Palace on May 21.