The brothers told People the breakup was unanimous and came after Nick Jonas told his brothers in a meeting earlier this month that he felt "trapped."
The New Jersey brothers formed the band in 2005 and built a fan base through their association with the Disney Channel.
The band had been scheduled to release its fifth album later this year.
North Coast killers on death row
Year arrived: 1997
Crime: Murdered Sonoma County Sheriff’s Deputy Frank Trejo
Richard Allen Davis
Year arrived: 1996
Crime: Murdered 12-year-old Polly Klaas
Year arrived: 1990
Crime: Murdered seven people, including his wife and two daughters
Year arrived: 2000
Crime: Home invasion-murder of 76-year-old Ellen Salling
Year Arrived: 1984
Crime: Convicted of killing two of his wives