The sequence at the 3' end of messenger RNA that does not code for product. This region contains transcription and translation regulating sequences.

Synonyms: 3'UTRs, Untranslated Region, 3', 3' Untranslated Region, UTRs, 3', 0, 3' UTRs, 3' UTR, Regions, 3' Untranslated, UTR, 3', Untranslated Regions, 3', 3' Untranslated Regions, Region, 3' Untranslated, 3'UTR