SDCL § 55-3-17: Discharge of trustee--Grounds.

A trustee can be discharged from his trust only as follows:

(1) By the extinction of the trust;

(2) By the completion of his duties under the trust;

(3) By such means as may be prescribed by the declaration of trust;

(4) By the consent of the beneficiary, if he has capacity to contract;

(5) By the judgment of a competent tribunal in a direct proceeding for that purpose that he is of unsound mind; or

(6) By the circuit court.