Tyson Soobotin had Nelson’s lone goal as the Leafs dropped a 4-1 result to the Dynamiters in Kimberley on Friday.
Tenzin Mint made 30 saves for the Leafs (18-7-1).
Derin Bamber scored twice for the Dynamiters (22-4-0), with Keegan McDowell and Chase Gedny adding singles. Adam Anderson meanwhile made 19 saves.
Nelson next faces the Columbia Valley Rockies at home Saturday.