The 51-year-old will be forced to take a break from the game after the Italian football authorities concluded that his attack on Adem Ljajic was inexcusable
The 51-year-old struck the Serb after Ljajic sarcastically applauded his substitution early in the encounter, and was promptly dismissed by the Viola.
In addition to losing his job, he has received a three-month suspension for his actions.
"The sporting judge, having received from the Federal Attorney a report citing article 35, 1.3, CGS in relation to the conduct of coach Delio Rossi in the 31st minute of the first half, acquired and examined television images, and all of the notifications and technical documents notes the following:
"The coach replaced the number 22 Viola player, who, having left the field of play, sat on the bench, apparently not accepting the decision, aimed ironic and provocative applause at the coach, presumably accompanied by some equally unappreciated words.
"Rossi suddenly jumped on the player, grabbing his left arm and hitting him repeatedly with his right arm to the face, until some employees removed him from Ljajic with difficulty.
"These images show conduct so thoughtless, violent and unpredictable, the seriousness of which cannot be mitigated by the emotional tension that a match generates.
"For these reasons, the coach Delio Rossi has been sanctioned with a three-month ban."
Meanwhile, Fiorentina have appointed Vincenzo Guerini as Rossi's replacement for the final two games of the season, and have also pledged to punish Ljajic for his role in the incident.
"The club would like to thank the coach and his staff for their work in the months of being together," an official statement on the club's website read.
"Vincenzo Guerini has been entrusted with the first team for the last two league games. Fiorentina have also announced that they are starting disciplinary proceedings against the player Adem Ljajic."