The Third Council of Dvin was a Caucasian Church council held in 607 (or 609-610) in the city of Dvin (then in Sasanian Armenia).
It appoints Abraham I as Catholicoi of the See of Etchmiadzin but opens the door to Sabellian-Modalism, Tritheism and especially Eutychian-Adoptionism. Many Armenian Miaphysites are dismayed and become Acephalian Gnostic Baptists at this point instead.