This book constitutes the refereed post proceedings of the Third International Scientific and Practical Conference on Information Technologies and Intelligent Decision Making Systems, ITIDMS 2023, held in Moscow, Russia, during December, 12-14, 2023. The 18 full papers included in this book were carefully reviewed and selected from 54 submissions. The papers presented in this volume focus on topics such as digital, intellectual and information transformation, the development of computer models and the improvement of automated and computing processes.