Inclusion Criteria - Confirmed diagnosis of symptomatic multiple myeloma (MM). - Eastern Cooperative Oncology Group performance status (ECOG) score of 0, 1, or 2. - Received 3 to 6 cycles of an induction therapy that includes a proteasome inhibitor (PI) and immunomodulatory (IMiD) [eg, bortezomib thalidomide and dexamethasone (VTd), lenalidomide, bortezomib and dexamethasone (RVd)] with or without a CD38 monoclonal antibody, or Velcade® (bortezomib), cyclophosphamide, dexamethasone (VCd), and followed by a single or tandem autologous stem cell transplantation (ASCT). Post-stem cell transplant consolidation is permitted. - Participants within 12 months from initiation of induction therapy who achieved at least a partial response (PR) after autologous stem cell transplantation (ASCT) with or without consolidation, according to International Myeloma Working Group (IMWG 2016) criteria. Exclusion Criteria - Progressive disease or clinical relapse (as defined by IMWG response criteria) following ASCT with or without consolidation or is not responsive to primary therapy. - Smoldering myeloma, solitary plasmacytoma or nonsecretory myeloma. - Known central nervous system/meningeal involvement of MM. - Prior history of malignancies, other than MM, unless the participant has been free of the disease for ≥ 5 years. - Other protocol-defined Inclusion/Exclusion criteria apply.