A PAS member sits on the sideline of the 63rd muktamar, which ended on May 1, 2016.
Istiqamah, which translates to remain steadfast, was the theme of the congress in Alor Setar, where delegates unanimously agreed to sever ties with PKR.
The syura council will decide on the next step, but the move shows the Islamist party is ready to face the 14th general election on its own.