The 3rd International Conference on Green Civil and Environmental Engineering (GCEE 2021) was the third event that we will hold on August 12, 2021 virtually with the theme: Energy-responsible building technology and life cycle for a sustainable built environment. The 3rd International Conference on Green Civil and Environmental Engineering was held as part of The 2nd International Conference on Green Construction and Engineering Education, to be a sharing forum. All academia, researchers, and students were invited to share their experiences in answering the challenges. The conference covered the following topics:

• Sustainable cities and architecture
• Renewable energy for built environment
• Waste treatment and management
• Energy and nutrient recovery from waste and wastewater
• Sustainable technology for water and wastewater treatment active
• Resilience of Water Resources Management in A Global Challenge
• Challenges of Integrated Water Resources Management
• GIS application in civil engineering
• Sustainable construction and building materials
• Sustainable technology in building and infrastructure
• Forensic process in structures and infrastructure: assessment, repair, and rehabilitation
• Disaster-resistant structures designs
• Technologies for safety and health management in construction
• Green building
• Building performance simulation
• Urban heat island and microclimate