3q29 microdeletion syndrome is a recurrent subtelomeric deletion syndrome with variable clinical manifestations including intellectual deficit and dysmorphic features. The disease is chromosome 3q29 microdeletion syndrome (MONDO_0012269). Also known as: 3q subtelomere deletion syndrome, 3q29 microdeletion syndrome, 3qter deletion, Del(3)(q29), chromosome 3q29 microdeletion syndrome, isolated cases, monosomy 3q29, monosomy 3qter.