The disclosure provides antibody agents that bind to a T Cell Immunoglobulin and Mucin Protein-3 (TIM-3) protein. Particular immunoglobulin heavy chain polypeptide and immunoglobulin light chain polypeptide sequences are explicitly provided. Also provided are related nucleic acids, vectors, compositions, and methods of using the anti-TIM-3 antibody agent to treat a disorder or disease that is responsive to TIM-3 inhibition, such as cancer, an infectious disease, or an autoimmune disease.