S.D. Codified Laws § 29A-5-112

In case of a breach of any condition on a guardian's or conservator's bond, an action may be maintained by any interested person for the use and benefit of the minor, the protected person, or the estate. However, no action may be maintained against the sureties on a bond unless such action is filed within four years after the guardian's or conservator's discharge or removal or within four years from the date the order surcharging the guardian or conservator becomes final, whichever is later.