The Third International Conference on Stochastic Methods (ICSM-3) was held June 3-9, 2018 in the village of Divnomorskoe (near the town of Gelendzhik) at the Raduga sports and fitness center of the Don State Technical University. Like ICSM-1 and -2, ICSM-3 was organized by the Steklov Mathematical Institute of RAS (Department of Theory of Probability and Mathematical Statistics), Moscow State University (Department of Probability Theory), and the Don State Technical University (Department of Higher Mathematics), the main university of Rostov-on-Don. The conference chairman was A. N. Shiryaev, a member of the Russian Academy of Sciences, who also headed the Organizing Committee and the Program Committee.