3q29 microdeletion syndrome is a recurrent subtelomeric deletion syndrome with variable clinical manifestations including intellectual deficit and dysmorphic features. The disease is Orphanet rare-disease nomenclature term Orphanet_65286 (3q29 microdeletion syndrome). Also known as: 3q subtelomere deletion syndrome, 3qter deletion, Del(3)(q29), Monosomy 3q29, Monosomy 3qter.