Receptor for the natriuretic peptide hormones, binding with similar affinities atrial natriuretic peptide NPPA/ANP, brain natriuretic peptide NPPB/BNP, and C-type natriuretic peptide NPPC/CNP (PubMed:10377427, PubMed:17951249). May function as a clearance receptor for NPPA, NPPB and NPPC, regulating their local concentrations and effects (PubMed:10377427, PubMed:17951249). May regulate diuresis, blood pressure and skeletal development (PubMed:10377427). Does not have guanylate cyclase activity (PubMed:10377427). Homodimer; disulfide-linked (By similarity). Interacts with OSTN (PubMed:17951249). Defects in Npr3 are the cause of a number of skeletal-overgrowth phenotypes, Longjohn (Lgj), Longjohn-2J (Lgj-2J) and Strigosus (Stri). These are all recessive conditions characterized by an elongated body, thoracic kyphosis, arachnodactyly, and sacral and/or tail kinks, but no significant changes in craniofacial structures (PubMed:10468599). Half of the mice dies before weaning. They display reduced ability to concentrate urine, a lower blood pressure, and skeletal abnormalities. Despite a reduced half-life of NPPA in the circulation, the plasma levels of NPPA AND NPPB are not affected. Has low affinity for peptide hormones in the absence of bound chloride. Belongs to the ANF receptor family.