A Study to Assess the Adverse Events, Change in Disease Activity, and How Intravenously Infused ABBV-319 Moves Through the Bodies of Adult Participants With Relapsed or Refractory (R/R) Diffuse Large B-cell Lymphoma (DLBCL), Follicular Lymphoma (FL), or Chronic Lymphocytic Leukemia (CLL)

Inclusion Criteria

• •For dose escalation (Part 1) only: Participants with documented diagnosis of B-cell malignancies including those with histology based on criteria established by the World Health Organization (WHO), and measurable disease requiring treatment, as per the protocol.
• •For the relapsed or refractory diffuse large b-cell lymphoma (DLBCL), follicular lymphoma (FL), and Chronic lymphocytic leukemia (CLL) dose expansion cohorts (Part 2) only: Participants with documented diagnosis of one of the B-cell malignancies noted in the protocol with histology based on criteria established by the WHO, and measurable disease requiring treatment, as per the protocol.
• •Laboratory values meeting the criteria noted in the protocol.
• •For participants previously treated with a CD19-targeting therapy (eg, CD19 monoclonal antibody) a core or excision tumor biopsy subsequent to the most recent CD19-targeting therapy must be collected.
• •Participant must have measurable disease, as defined by the 2014 Lugano Classification.