Lock Andrew Coombs has been banned for three weeks following an incident during Newport Gwent Dragons' 17-15 Pro12 defeat by Ospreys.
Coombs was cited and found guilty of stamping on Ospreys' Alun Wyn Jones at Rodney Parade.
The 29-year-old, 10-times capped Wales forward is free to play again on 6 October.
He will miss Pro12 games against Glasgow, Treviso and Scarlets, but can face Edinburgh on 11 October.
Coombs came off the bench to replace veteran Ian Gough against Ospreys.