Lock Donnacha Ryan has been suspended for three weeks after being found guilty of stamping during Ireland's victory over Samoa last weekend.
Ryan, 26, was issued with the suspension - which runs until December 5 - by a Six Nations disciplinary committee on Tuesday.
The Munster man will therefore miss Ireland's home Tests against the All Blacks this Saturday, and Argentina a week later.
Ryan came on for the last 13 minutes against Samoa as his seventh cap ended with a 20-10 win at Lansdowne Road.
A statement following the hearing, chaired by Roger Morris (Wales), confirmed: "Having considered all of the evidence, the disciplinary committee, which also comprised Achille Reali (Italy) and Simon Thomas (Wales), found that the player was guilty of foul play and imposed a suspension of three weeks from November 15, 2010 until midnight on Sunday, December 5 2010.
"The committee, having listened to submissions from Mr Ryan, his legal representative and Paul McNaughton, the Ireland team manager and viewed the video evidence, found that the incident merited a mid-range entry point in the IRB list of sanctions which they then reduced on account of the player's exemplary disciplinary record and good conduct at the hearing."