Must have relapsed/refractory multiple myeloma (RRMM) and have evidence of disease progression after last therapy. Must have exhausted all available treatment options accessible as local standard of care (example. proteasome inhibitors [PIs], immunomodulatory imide drugs [IMIDs], anti CD38 monoclonal antibodies [mAbs] and therapies targeting Exportin 1 [XPO1] and B cell maturation antigen [BCMA]). Must not be eligible for a clinical trial with teclistamab or other medicines in this setting