This volume presents the proceedings of the 3rd International Conference of Geography and Geoinformatics for Sustainable Development (ICGGS), held in Can Tho, Vietnam, November 30 - December 2, 2023. It focuses on cutting-edge applications of geoinformatics for sustainable development, including using artificial intelligence and machine learning in environmental monitoring, integrating the Internet of Things (IoT) for real-time data collection, and advanced techniques in remote sensing for urban development and climate change adaptation. Additionally, this volume features case studies predominantly from Vietnam and Thailand, providing fresh insights into regional challenges and innovative solutions for sustainable resource management.