The 50th edition of the ISMD conference series, postponed from summer 2020, bringing together physicists from across particle, nuclear, and astro-physics for talks and discussions on all aspects and consequences of the strong nuclear force and complex final states. ISMD is a "crossroads conference" between several different fields, with all talks in plenary session to encourage interaction. A poster session with rapid-fire "flash talks" and prizes provides an additional venue for research presentation.

Due to the ongoing health risks and travel restrictions of the Covid-19 pandemic, ISMD2021 will operate as a virtual conference. The conference fee has been waived, and registration and the call for abstracts are now open.