Thats the thing though, I dont think they can.
Clubs are contractually obligated to pay players every week regardless of whether they are playing, or injured, or banned.
So unless Suarez agrees to donate his wages back to the club, Liverpool will have to take him to court.
That would be the only way Suarez could make things right in my eyes, if I was a Liverpool fan, if he holds his hands up and says, "Look I ****ed up and you are being punished for it, I will give my wages back to the club for the entirety of my suspension", that would be a great gesture from him and the only way he could redeem himself imo.