Brian O'Driscoll has been banned for three weeks for stamping on Italy's Simone Favaro and will miss Leinster's Amlin Challenge Cup quarter-final.
O'Driscoll was sent to the sin-bin for only the second time in his 14-year professional career in the first half of the Six Nations match at the Stadio Olimpico, which Ireland lost 22-15.
He was cited and an independent disciplinary committee in London found him guilty of the offence and issued the three-week ban.
It means he will miss Leinster's Amlin Challenge Cup quarter-final against Wasps on April 5.
But the ban finishes three days later and he will be available for Leinster's push for the RaboDirect PRO12 title. They are currently in third place and look certain to take part in the end-of-season play-offs.
O'Driscoll, playing in what is thought to have been his 125th and final Test for Ireland, was sent to the sin-bin after he lifted his right leg and brought it down on to the chest of Favaro, the Italy openside, who yelled out in pain.
At the disciplinary hearing, the 34-year-old former Ireland and Lions captain admitted he had committed an act of foul play but denied it warranted a red card.
The disciplinary committee, chaired by Robert Williams of Wales, however, upheld the citing complaint and decided the offence should have been punished with a sending off.
A statement released by tournament organisers read: "In applying the sanction, it was considered that the stamp, contrary to Law 10.4(b), was in the mid range of the IRB's sanctions for the type of offence.
"After hearing from Brian O'Driscoll and his representatives, a reduction of two weeks of mitigation was allowed, particularly taking into account the player's exemplary previous playing and disciplinary record.
"Brian O'Driscoll is suspended until 8 April 2013 and has the right of appeal."