RecruitingPhase 2Drug trialVenetoclax-Obinutuzumab +/- Acalabrutinib in R/R CLLThis research study is studying a combination of drugs as a possible treatment for chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL). The names of the study drugs involved in this study are: * obinutuzumab * venetoclax * acalabrutinib