Unga and a member of BYU's women's basketball team, Keilani Moeaki, both withdrew from school at the same time, according to the press release, as a result of a violation of the BYU honor code.
Unga and Moeaki have dated the past three years and made the decision to withdraw together.
There is no word from BYU officials when and if either Unga or Moeaki will return to BYU. Unga had been slated to be a key cog on BYU's football team next season as the Cougars break in a new quarterback and tight ends with the loss of seniors Max Hall, Dennis Pitta and Andrew George.
Moeaki and Unga broke off an engagement and marriage plans a year ago, but Moeaki told the Deseret News two weeks ago the two had been dating.