Andre Roberson canceled a Friday press conference at which he was scheduled to announce whether he would enter the NBA draft.
The deadline is 10 p.m. Sunday for non-seniors to declare for the draft.
"It's a big decision, an emotional decision," Colorado coach Tad Boyle said. "Especially for Andre, when you want something (professional career) so much and you're also at a place (CU) that is so special to him, you're torn.
"Andre sees the benefits and risks of both, and he's weighing those benefits and risks. At the end of the day, he'll do what's best for him."