Nepal should practically reduce the burden of unnecessary dependence on India or China. For sustainable Development in this region, the author has proposed a two-step model for Nepal, India, and China to establish and enhance sustainable close neighborly relations. One is the Nepal-India-China Equitable Model (NNICE Model): Nepal India China Equitable Model). Which strengthens diplomatic ties between these immediate neighboring countries. The second one is the Nepal-India-China Economic Development Model (NICED Model) which addresses the economic prosperity of these neighboring countries. The Immediate neighboring countries essence to be responsible to make warm relationships for the protection(Security), peace, and prosperity.