The deadline to withdraw from the draft and return to college was a few hours ago. Here are a list of players I've found who will return to school, post-combine, and who generally appeared to be actual draft prospects:
Dillon Brooks, F, Oregon
Tyler Dorsey, G, Oregon
Josh Hart, G, Villanova
Caleb Swanigan, F, Purdue
Justin Jackson, F, UNC
Nigel Hayes, F, Wisconsin
Isaiah Briscoe, G, Kentucky
Melo Trimble, G, Maryland
Malik Newman, G, Mississippi State
A couple of surprises on that list -- I personally thought Melo Trimble would stay in, for example. The draft got a little shallower, but not much more than was expected.