A Study to Evaluate the Efficacy and Safety of Obinutuzumab in Participants With ISN/RPS 2003 Class III or IV Lupus Nephritis

Key Inclusion Criteria: * Diagnosis of active or active/chronic ISN/RPS 2003 Class III or IV proliferative LN as evidenced by renal biopsy performed within 6 months. Participants may co-exhibit Class V disease in addition to either Class III or Class IV disease * Urine protein to creatinine ratio greater than or equal to (\>/=) 1 on a 24-hour collection * Other inclusion criteria may apply Key Exclusion Criteria: * Pregnancy or breastfeeding * Severe renal impairment or the need for dialysis or renal transplantation * Receipt of an excluded therapy, including any anti-CD20 therapy less than 9 months prior to screening or during screening; or cyclophosphamide, tacrolimus, ciclosporin, or voclosporin during the 2 months prior to screening or during screening * Significant or uncontrolled medical disease which, in the investigator's opinion, would preclude participant participation * Known active infection of any kind or recent major episode of infection * Intolerance or contraindication to study therapies * Other exclusion criteria may apply