MONDO_0010894 (maturity-onset diabetes of the young type 3) is monogenic diabetes caused by inactivating mutation(s) in the gene HNF1A, encoding hepatocyte nuclear factor 1-alpha. Also known as: HNF1A maturity-onset diabetes of the young (disease), HNF1A-associated monogenic diabetes, MODY type 3, MODY, type III, MODY3, hepatocyte nuclear Factor 1-Alpha-associated monogenic diabetes, maturity-onset diabetes of the young (disease) caused by mutation in HNF1A.