Orphan receptor that acts as a critical modulator of planar cell polarity during gastrulation. Controls the localization of dishevelled. Interacts (via PDZ-binding motif) with disheveled proteins; leading to the localization of dishevelled proteins to specific membrane subdomains. Ubiquitously expressed at very low levels. Highly expressed during early development and then ubiquitously expressed at very low levels at later larval stages. Morpholino knockdown of the protein exacerbated the convergence/ extension (C/E) phenotypes of other planar cell polarity (PCP) family member mutants (vangl2, scribbled). Most adhesion GPCRs proteins undergo autoproteolysis at the GPS domain. ADGRA3 is predicted non-cleavable because of the lack of a consensus catalytic triad sequence within GPS domain. Belongs to the G-protein coupled receptor 2 family. Adhesion G-protein coupled receptor (ADGR) subfamily.