The school announced the NCAA's ruling in a statement from athletic director Dan Guerrero about 80 minutes before the Bruins' season opener against Indiana State on Friday night.
"The NCAA has finally determined that a violation of the NCAA amateurism rules has occurred involving UCLA freshman guard Shabazz Muhammad and his family," Guerrero said. "As a result, he is ineligible for competition at this time. We are extremely disappointed that the NCAA has made this determination."
Guerrero said UCLA believes "the decision is incorrect and unjust to Shabazz."
He said the school will pursue its options to challenge the NCAA ruling.