BBC Wales understands the process is underway to remove Evans’ party membership.
Speculation has been heightened that Evans could defect following a BBC interview on Sunday, where he criticised UK party leader Kemi Badenoch and declined to say if he had spoken to Reform.
He also edited a Facebook post on Monday to remove a reference to his party.
“I will take some time in the coming weeks to consider my political future,” said Evans, who represents Brecon and Radnorshire in the Senedd.
He added: “I have been concerned for some time over the direction of the Conservative party at a UK level and I feel it no longer represents my conservative values and beliefs.
“Politics should be a broad church of views and opinions, and it is a sad day when the party does not allow free speech or criticism.”