On behalf of IAHR Asia Working Group (AWG), we are pleased to conclude the 3rd IAHR-Asia Symposium on Hydraulic Machinery and Systems (IAHR-Asia 2021), which was held on November 22-23 in Kathmandu University, Nepal.Seventy full papers were presented in two days of the conference whereas four invited and four featured presentations were also given by eminent personalities of the field. Presentations were broadcasted both in a physical mode and virtual mode in four groups of sessions, each group consisting four parallel sub-sessions. It was our privilege to welcome the keynote speakers of the symposium: Prof. Avellan from Swiss Federal Institute of Technology, Lausanne, Prof. Young-Ho Lee from Korea Maritime and Ocean University, Prof. Zhengwei Wang from Tsinghua University, and Prof. Chisachi Kato from The University of Tokyo. We would also like to thank all the organizers, presenters and participants who were involved in this symposium.The list of Conference Organizing Committee, Local Organizing Committee, International Advisory Committee, International Technical Committee are available in this pdf.