Misjoinder of parties is not a ground for dismissing an action. On motion or on its own, the court may at any time, on just terms, add or drop a party. The court may also sever any claim against a party.
Misjoinder And Non-Joinder Of Parties
Mont. Code Ann. tit. 25, ch. 20, Rule 21, under Parties.
Mont. Code Ann. tit. 25, ch. 20, Rule 21