This study is for patients that have been diagnosed with smoldering multiple myeloma (SMM). The drugs used in this study are daratumumab, lenalidomide and dexamethasone which are all commercially used drugs. The purpose of this study is to compare overall survival in patients with high-risk smoldering multiple myeloma randomized to daratumumab revlimid-dexamethasone or revlimid-dexamethasone. Participants can expect to be on this study for up to two years and followed by your doctor for up to 15 years.