The study will consist of 5 parts: 1) an initial Monotherapy Dose Escalation (MDE) part, 2) a Combination Dose Escalation (CDE) part, 3) a Pharmacokinetic (PK) Evaluation part, 4) an Alternate Schedule Evaluation (ASE) part and 5) a diffuse large B-cell lymphoma (DLBCL) Expansion part.
The primary objective of this study is to determine the safety and tolerability of GS-0189 (formerly FSI-189) as monotherapy and in combination with rituximab in participants with relapsed/refractory (R/R) non-Hodgkin lymphoma (NHL).