A Study to Evaluate Adverse Events of Subcutaneous (SC) Epcoritamab Administered in the Outpatient Setting in Adult Participants With Relapsed or Refractory Diffuse Large B-Cell Lymphoma and Classic Follicular Lymphoma

Inclusion Criteria:

Diagnosis of Relapsed or Refractory (R/R) Diffuse Large B-Cell Lymphoma (DLBCL) or R/R Classic Follicular Lymphoma (cFL), with documented CD20+ mature B-cell neoplasm according to World Health Organization (WHO) classification 2016 or WHO classification 2008 based on representative and most recent pathology report:

Can include participants with "double-hit" or "triple-hit" DLBCL (technically classified in WHO 2016 as HGBCL, with MYC and BCL2 and/or BCL6 translocations). Note: Other double-/triple-hit lymphomas are not eligible.
Relapsed or refractory disease and previously treated with at least 1 prior systemic anti-lymphoma therapy for DLBCL and 2 prior systemic antineoplastic therapies for cFL including at least 1 anti-CD20 monoclonal antibody-containing therapy

Has at least one target lesion defined as:

≥ 1 measurable nodal lesion (long axis > 1.5 cm and short axis > 1.0 cm) and/or ≥ 1 measurable extranodal lesion (long axis > 1.0 cm) on CT (or MRI) AND
FDG PET scan demonstrating positive lesion(s) compatible with CT (or MRI) defined anatomical tumor sites.
Must have Eastern Cooperative Oncology Group (ECOG) performance status 0 - 2.
Adequate organ function.

Exclusion Criteria:

Central nervous system (CNS) involvement by lymphoma.
Uncontrolled Human Immunodeficiency Virus (HIV) infection. HIV viral load that is undetectable and controlled with medication for at least 1 year prior to enrollment is allowed. Note: If subject has no history of HIV infection, HIV testing does not need to be conducted at screening unless it is required per local guidelines or institutional standards.