Asked for his views on Suarez's four-month global ban for biting, Valcke told reporters: "I think he should find a way to stop doing it.
"He should go through a treatment. It is definitely wrong."
Uruguay striker Suarez was kicked out of the World Cup on Thursday for biting Italy defender Giorgio Chiellini during a Group D match on Tuesday.
It is the third time in Suarez's career he has been banned for biting.
Valcke dismissed comments from Chiellini on Friday who said the punishment on Suarez -- the heaviest sanction of a player at a World Cup ever -- was too harsh.
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When pointed out that Chiellini was the victim, Valcke replied: "So what?
"They are decisions which are made by the disciplinary committee based on what they have seen," Valcke said.
"Again, it's not just about the incident -- it was seen by hundreds of millions of people.
"It is not what you want, your kids, the little ones who are playing football around the world, to see in a football game at the level of the World Cup, or any level -- amateur football or professional football."