Racing Metro fly-half Jonathan Wisniewski, Toulon's Jocelino Suta and Agen lock Andrew Springgay will all miss the final two rounds of Pool action after suspensions handed down by the Ligue Nationale d Rugby's disciplinary committee.
Wisniewski was found guilty by the hearing of a dangerous tackle on Montpellier wing Martin Bustos Moyano when the sides met on January 2.
The fly-half who has notched up 26 points in this year's Heineken Cup was suspended for 20 days, ruling him out of Racing's matches against ASM Clermont Auvergne and Leinster.
Toulon's Suta was also handed down a 20 day suspension again for a dangerous tackle and can resume playing on February 1. The second-row has played in all four of the Pool 3 leaders games in Europe's premier competition this season but is now unavailable for the visit of double Heineken Cup Champions Munster and the game against the Ospreys the following week.
Also found guilty and suspended for 10 days was Agen lock Australian Springgay for his outburst in the match against Toulouse on 29 December.