Hawrysch was "released" from the rock band because of "personal issues," according to a statement issued Monday by the group's publicist, Mitch Schneider.
Hawrysch joined the band in 1991.
He will be replaced on the Black Crowes' fall tour — which begins in Richmond, Va., on Sept. 7 — by Rob Clores, who has played with the John Popper Band and other blues artists.
The band has delayed the release of its new double album "The Lost Crowes." Originally scheduled to hit stores Tuesday, a "recently discovered manufacturing error" has caused the record's release to be postponed until Sept. 26.