Oregon Revised Statutes Human Services; Juvenile Code; Corrections § 419B.237

(a) The court terminates the appointment;

(b) The juvenile court proceeding is dismissed; or

(c) The parent's parental rights are terminated, unless the court continues the appointment.

(a) Shall remove the guardian ad litem if the court determines that the parent no longer lacks substantial capacity either to understand the nature and consequences of the proceeding or to give direction and assistance to the parent's attorney on decisions the parent must make in the proceeding; or

(b) May remove the guardian ad litem on other grounds as the court determines appropriate.