We are pleased to announce the Call for Papers for the 3rd International Workshop on Artificial Intelligence and Social Systems (AISOS 2026), co-located with IJCAI 2026. Topics of Interest: - AI for healthcare and epidemiology - Computational social science - Fairness, accountability and transparency - AI-assisted policy making Important Dates: - Submission deadline: April 30, 2026 - Notification: June 15, 2026 - Camera-ready: July 1, 2026 All accepted papers will be published in the Springer LNCS proceedings.