Ch. A. Agayeva2025-10-0620100094-9000https://gcris.yasar.edu.tr/handle/123456789/7003The purpose of this paper is to give necessary conditions of optimality of nonlinear stochastic control systems with variable delay for singular controls. As a result the second order necessary optimality condition for the stochastic system with uncontrolled diffusion coefficient is obtained.EnglishStochastic differential equations with delay, stochastic control problem, necessary condition of optimality, singular controls, adjoint stochastic differential equationsArticle