Any nephronophthisis in which the cause of the disease is a mutation in the XPNPEP3 gene. The disease is nephronophthisis-like nephropathy 1 (MONDO_0013163). Also known as: NPHP-XPNPEP3, NPHPL1, XPNPEP3 nephronophthisis (disease), nephronophthisis (disease) caused by mutation in XPNPEP3, nephronophthisis-like nephropathy type 1.