The Symposium on Magnetism and Spintronics (SMS 2026) is being organized by the Indian Institute of Technology Hyderabad (IIT-H), Hyderabad, Telangana, India, from January 21st to January 24th, 2026. The objective of the conference is to provide a platform for interaction among scientists, experts, and technologists to share their fundamental understanding of magnetism and/or spintronics, as well as R&D on futuristic materials for the next generation. The SMS conference aims to bring experts working in the field of magnetism and/or spintronics. The first SMS conference (SMS-1) was held at NISER, Bhubaneswar, in 2021. The third edition of this conference, i.e., SMS-3 (SMS-2026), will be held at the beautiful campus of IIT Hyderabad. The technical programme of the conference will consist of invited talks, contributed talks, and poster presentations.