The Australian native has enrolled at Canada Prep Academy in Ontario. He was a part of CU's 2017 recruiting class and was expected compete at either tight end or defensive end with the Buffaloes.
Arriving just before the start of camp, Olver participated in CU's first practice on July 29 and then boarded a plane to return to his home in Brisbane.
Olver responded to Buffzone.com through a direct message on Twitter, writing: "I left CU for personal reasons. The timing was unfortunate. I am very grateful for the opportunities CU and coach Mack (sic) gave me, and I apologize to them for this situation. I wish them the best moving forward with their season and future."
Olver played his final two seasons of high school football at Marin Catholic High School in Kentfield, Calif., and then went home to Australia at the start of the summer. He and CU went through a lengthy process to get his student visa so he could enroll at CU and play for the Buffs.
Olver wound up being in Boulder for only about 48 hours.
"He just left, that's all I can say," head coach Mike MacIntyre said earlier this month. "It was really kind of bizarre. I wish him the very best, but it was disappointing when he left.
"We worked really, extremely hard with him and had to jump through a lot of hoops to come over here. It's extremely disappointing. I think it's a huge mistake on his part, but kids make choices and now he's got to live with it and we'll move on."
Canada Prep Academy was established in 2014 to help football players prepare for balancing academics and athletics at the college level.
Contact staff writer Brian Howell at firstname.lastname@example.org or twitter.com/BrianHowell33.