The band, Rakuda, made the announcement this morning (26 November) following the news Cody Ackland had been charged with murder following Bobbi-Anne McLeod's disappearance.
He is accused of murdering the 18-year-old girl between November 20 and November 23.
The 24-year-old, from the Southway area of Plymouth, appeared at Plymouth Magistrates' Court this morning.
He spoke only briefly to confirm his name, date of birth and address.
His former bandmates stated they would be disbanding the group immediately "as a mark of respect" to the Leigham teenager.
The four remaining members, Josh, Ross, Josh, and Mike, said the band is "extremely shocked and in complete disbelief" by what has happened over the past several days.
Ackland was the lead guitarist and main songwriter for the band.
Rakuda has removed its band photos from the Facebook page, and changed its profile picture to a candle - in tribute to Bobbi-Anne McLeod.
In a statement, the band wrote: "The remaining members of Rakuda; Josh, Ross, Josh and Mike are all extremely shocked and in complete disbelief by the tragic event that has unfolded over the last several days.
"Our thoughts and prayers are with Bobbi-Anne McLeod’s family and friends who must be devastated at their loss.
"As a mark of respect, we have decided that we shall not be going forward as a band and will be disbanding with immediate effect. We will not be making any further comments at this time."