In today's world, Sustainable development is becoming a crucial part to meet the increasing demand of future generations. The 3rd International Conference on Intelligent Sustainable Systems [ICISS 2020] is one of the initiative toward attaining sustainable development and facilitating collaborative forums in international level. This 3rd International Conference on Intelligent Sustainable Systems [ICISS 2020] organized on 3-5, December 2020 by SCAD Institute of Technology, Palladam, and St. Mother Theresa Engineering College, Thoothukudi, Tamil Nadu provides unique opportunity to bring together academicians, researchers, scientists and research scholars to share and exchange ideas and practical solutions towards achievement of intelligent sustainable systems for a more sustainable future. This conference also aims to create an interdisciplinary platform to share their research ideas on developing new models and algorithms for sustainable development and provide intelligent paradigm shifts to deal with uncertainties and imprecise problems in real-world.