In the title organotin compound, [Sn(C(6)H(5))(C(10)H(15)N(3)O(2)S)Cl(H(2)O)], the Sn atom is coordinated by the S, O, and imine N atoms of the dinegative tridentate ligand, a chloride ligand, the ipso-C atom of a phenyl ligand and by a water mol-ecule in a distorted octa-hedral coordination environment. Coordin-ated water mol-ecules link the organotin mol-ecules by forming O-H⋯O hydrogen bonds with both carbonyl and carboxyl-ate O atoms, leading to 12-membered {⋯OCO⋯HOH⋯}(2) synthons. This results in the formation of supra-molecular chains along the c axis. The chains pack in the ac plane and stack along the b axis with links between layers afforded by N-H⋯Cl hydrogen bonds.