Daratumumab in Combination With Lenalidomide and Dexamethasone in Relapsed and Relapsed-refractory Multiple Myeloma

Participants will receive intravenous (injection of a substance into a vein) infusion of daratumumab in an increased fashion from 2 milligram per kilogram (mg/kg) up to maximum dose of 16 mg/kg. Considering the safety and efficacy of dose in Part 1, recommended phase 2 dose (RP2D) for Part 2 of the study will be decided. A predose infusion of 10 percent (%) of the full dose of daratumumab will be administered a day before the first full infusion of the first cycle. Participants will receive 4 weekly infusions in the first 2 treatment cycles. From cycles 3 to 6 infusions will be administered every alternate week and monthly infusions will be administered from cycle 7 until disease progression.

Participants will receive RP2D as determined in Part 1 of the study. Participants will receive 4 weekly infusions of RP2D in the first 2 treatment cycles. From cycles 3 to 6 infusions will be administered every alternate week and monthly infusions will be administered from cycle 7 until disease progression.

All participants (Part 1 and Part 2) will receive 25 mg lenalidomide orally (by mouth) from days 1 to 21 of each 28-day cycle until disease progression.

All participants (Part 1 and Part 2) will receive 40 mg (20 mg intravenously \[injection of a substance into a vein\]) dexamethasone once weekly. Participants older than 75 years or underweight (body mass index \[BMI\] less than \[\<\] 18.5), the dexamethasone dose will be administered at a dose of 20 mg once weekly until disease progression.