Mo. Rev. Stat. § 513.520
Whenever, in any case not in sections 513.475 to 513.530 otherwise provided for, it shall become necessary, in any proceeding at law or in equity, to sever or set out any homestead from other real estate, the court in which such proceedings shall be pending may appoint three commissioners to appraise and set out such homestead, which commissioners, after being sworn to the faithful discharge of their duties, shall appraise and set out such homestead in the same manner as is provided in sections 513.475 to 513.530 for setting out homesteads in case of the levy of execution, and make report of their doings to such court, which report shall be confirmed by such court, unless good cause be shown to the contrary; and a record thereof shall be made in the records of lands, where a deed of such homestead would by law be required to be recorded, which shall operate as a severance of such homestead from such other real estate.
§ 513.520, RSMo
RSMo 1939 § 617