This book constitutes the proceedings of the Third International Conference on Innovations of Intelligent Informatics, Networking and Cybersecurity, 3INC 2025, which took place in Babylon, Iraq, during December 15–16, 2025. The 15 full papers and 2 short papers included in this book were carefully reviewed and selected from 58 submissions. They were organized in topical sections as follows: Security and Privacy; Networks; and Computing Methodologies.