<p>Two good scores are all you need. Some students submit more than two scores because their high school requires that students take an SAT Subject Test upon completion of an honors course. My son, for example, applied last year with six SAT Subject Tests. I suppose you could take a third test, but if your scores are 770 and 780 on the first two, I don’t think one more test will dramatically increase your chances.</p>
<p>EDIT: And no, they would never return to three tests without giving students several years notice in advance.</p>