Ireland will be without Peter O'Mahony until the final game of the Six Nations following his red card against Wales.
Peter O'Mahony has been banned for the next three rounds of Six Nations games following his red card in Ireland's opening defeat to Wales.
O'Mahony was dismissed in the 14th minute of Ireland's 21-16 loss in Cardiff after leading with his elbow to the head of Tomas Francis while attempting a clearout.
The flanker can now not feature for Ireland again until their final match of the tournament, which sees them host England on March 20.
O'Mahony admitted to dangerous play in the ruck and that his actions merited a red card during a disciplinary hearing.
The disciplinary committee deemed the entry point for his offence to be a six-week ban, but halved that suspension after taking into account O'Mahony's record and conduct in the hearing.
In a statement, Six Nations organisers said: "The committee considered all the relevant evidence, including the player's oral evidence, together with the clips of the incident.
"In assessing the seriousness of the offending, the committee found that the offending was reckless."
Ireland will attempt to bounce back on Sunday when they welcome France to Dublin.