From the official UCLA site:

UCLA junior center Joshua Smith has chosen to leave the men's basketball program and has been granted his release, effective immediately.

Smith participated in all six contests UCLA has played in thus far in the 2012-13 season and averaged 5.2 points and 4.2 rebounds per game in 13.5 minutes played.

"Joshua is a fine young man who has meant a lot to this program," said UCLA head coach Ben Howland. "I know I speak for myself and my staff when I thank him for his time in Westwood and wish him well in his future endeavors."

A native of Kent, Washington, Smith entered his junior season with the Bruins averaging 10.4 points, 5.6 rebounds and 19.5 minutes played in 65 career games (24 starts) over his first two years in Westwood.

"I have made the decision to leave the program for personal reasons," Smith said. "I have thoroughly enjoyed my time at UCLA and am grateful for the opportunity that has been presented to me here."