Walker, who is running for re-election this year, called for the freeze on Friday. He says it's in reaction to the latest projections showing UW has a surplus of more than $1 billion.
The budget Walker signed into law last year had a two-year tuition freeze, which was also motivated by reports of a large surplus.
Walker says in a statement that after years of tuition increases, it is important to give students and their families a break.
Republican legislative leaders did not immediately respond to emails seeking reaction. The UW Board of Regents was meeting Friday and a university spokeswoman did not immediately respond to a request for comment.