ADGRL3 (Adhesion G Protein-Coupled Receptor L3) is a gene that codes for a protein in the adhesion G protein-coupled receptor family, which aids in cell-to-cell communication and supports the development and functioning of the nervous system. It plays a crucial role in brain formation, neuronal signaling, and maintaining neural connectivity. Variations in ADGRL3 have been linked to neurological conditions, including attention deficit hyperactivity disorder (ADHD).