S.D. Codified Laws § 55-3-25
A trustor, trustee, or beneficiary may but is not required to seek court affirmation of a modification or termination of a trust made pursuant to § 55-3-24. Upon petition by a trustor, trustee, or beneficiary, upon a finding that the provisions of § 55-3-24 have been met, the court shall affirm the proposed modification or termination of the trust. If any beneficiary does not consent to a requested modification or termination of a trust by the other beneficiaries or by the trustor and other beneficiaries, the court, with the consent of the other beneficiaries, and of the trustor, if required, may approve a requested modification or partial termination if the rights or interests of the beneficiaries who do not consent are not significantly impaired or adversely affected. Upon modification or partial termination of the trust, the trustee shall distribute the trust property as ordered by the court.
SDCL 55-3-25