The 53-year-old was ejected from the touchline during the D.C. United match.
Montreal Impact coach Marco Schallibaum has banned for an additional game and fined a further $5,000 for repeated misconduct.
The 53-year-old initially incurred a one-match suspension and $500 penalty charge after being sent off during Montreal’s win over DC United last Saturday following a touchline flare-up with opposition manager Ben Olsen.
An aerial duel between DC’s James Riley and Montreal’s Justin Mapp, which sent the latter flying into a camera, sparked the fierce confrontation that saw both given their marching orders by the referee and Riley receive a yellow card.
Riley’s automatic one-game suspension and fine were rescinded by MLS Commissioner Don Garber on Friday, but Schallibaum was the subject of more punishment.
However the former Switzerland right back maintains he was merely going to check up on the wellbeing of his player after the robust challenge.
“I spoke for my player, Justin Mapp, because he fell down into the camera. Because he’s my player, I wanted to go see what happened because it’s a very dangerous situation,” he told CBC Sports at the time. “I was out a little bit from my zone.”
This is the third time Schallibaum has been ejected from the dugout this season and suspended for entering the field on another occasion.