Harrow will transfer to another program.
"We wish him well and will do anything we can to assist him in this process," said NC State head men's basketball coach Mark Gottfried in a written statement.
Gottfried said he would release Harrow to any school except one in the Atlantic Coast Conference. He will take a year off.
"I think this staff will do good things here at NC State," said Harrow. "The year off will help me improve in many ways and I think the decision is the best for me personally."
Harrow played in 29 games, starting 10, and averaged 23 minutes per contest for the Wolfpack in 2009-10.