The Dutchman, who plays as a midfielder and as a full-back, was dismissed by referee Andre Marriner in the 94th minute of the 1-0 victory over Derby in the Sky Bet Championship last Saturday.
He shoved assistant Mark Russell after a throw-in was awarded to the Rams.
A statement from the Football Association on Friday morning read: "Aston Villa's Leandro Bacuna will serve a six-match suspension following his dismissal in the game against Derby County.
"He admitted a breach of FA Rule E3 in that his behaviour in or around the 94th minute of the game constituted violent conduct in circumstances where the standard punishment of three matches would be clearly insufficient
"Following an Independent Regulatory Commission hearing, a three-match suspension was added to the sanction the player is already serving following his dismissal."
Source : PA