The online announcement Friday offered no explanation for Chamberlin's exit but did assure Smashing Pumpkins fans the band would be resuming studio recording this spring, the Chicago Tribune reported.
"Corgan will continue to write and record as Smashing Pumpkins," the posting said, referring to Pumpkins lead singer Billy Corgan.
Corgan is the only remaining original member of the "Siamese Dream" band, which formed in 1988 in Chicago. The band's original members included Corgan, Chamberlin, guitarist James Iha and bassist D'arcy Wretzky.
Wisconsin business offering 'therapeutic cuddling' forced to close
Video of Victoria’s Secret models trying to 'twerk' hits Instagram