University of Toronto (U of T only requires three Subject Tests of applicants to one of its colleges [Applied Science and Engineering]; applicants to other colleges in the university may submit AP or IB tests combined with or in lieu of Subject Tests to fulfill this requirement.

Ecole Hoteliere de Lausanne (may also submit three AP or IB exams or may qualify with 28 points or better on IB Diploma.

There are now no longer ANY schools in the United States that require submission of three Subject Tests (although Georgetown does still strongly recommend three).