Angus Young of AC/DC says his bandmates have not been in touch with Phil Rudd since the drummer was charged last week with threatening to kill and drug possession.
Young, 59, said Rudd's behaviour had been erratic during the recording of their new album.
"Well, we had a few problems. The situation he's in - that took everyone by surprise. We had a few issues before with him, even when we were recording it was hard even to get to him to do the recording," Young said.
"And then he was supposed to show up to do promos with us, to do video shoots and a few shoots and a few other things, and he never showed up for that either. So, at this stage, it's a pretty tough call for us."
Rudd, who has been with the band on and off for nearly three decades, was released last week. He is expected to appear in court in New Zealand on November 27 charged with threatening to kill and possessing methamphetamine and marijuana.
"We haven't had contact," Young said. "But he has his people that represent him. He's got himself in a pickle."
Police initially accused Rudd of trying to arrange for a hitman to carry out two killings. He was charged with attempting to procure murder, which comes with a maximum 10-year sentence, but the charge was dropped after a day.
Rudd, 60, could face a maximum term of seven years for the charge of threatening to kill.
AC/DC's new album, Rock Or Bust, will be released on December 2 and they are due to tour next year.
Young said they will continue to promote the album and perform without Rudd if necessary.
"We were resolved for us to go forward and I think Phil ... it's something he's got to do himself. He's got to sort himself out, I think," Young said. "But we were resolved to go forward. So at this point it's kind of a question mark. But if we're touring, there will be a drummer in place, put it that way."
The Australian band also faced a shake-up in its line-up when 61-year-old guitarist Malcolm Young, who has dementia, announced in September he was leaving the group because of his health. Stevie Young, nephew of founding members Malcolm and Angus Young, played guitar on the band's new album and will join them on the tour.