Scott Weiland has suddenly dropped off the bill for this Saturday's Save Tibet concert in Atlanta, and has canceled two other previously announced dates and postponed a third.

In addition to the Atlanta show, Weiland has nixed shows scheduled for May 11 in Charlotte, North Carolina, and May 12 in Virginia Beach, Virginia. The Stone Temple Pilots frontman has also pushed back a Philadelphia concert slated for May 13 to June 2.

According to management, Weiland needs more time to rehearse with his band, which features his producer, Daniel Lanois, as well as former Porno for Pyros members Martyn LeNoble and Pete DiStefano.

Weiland now plans to kick off his summer tour on May 15 at the 9:30 Club in Washington, DC before playing the WHFS Festival in the same city the following day.