| threateningly | d'une manière menaçante |
| three | trois |
| Three Act Tragedy | Drame en trois actes |
| Three August Ones and Five Emperors | Les trois Augustes et les cinq Empereurs |
| Three Bishoprics | Trois-Évêchés |
| Three body problem | Probleme des trois corps |
| Three Cheers for Sweet Revenge | Three Cheers for Sweet Revenge |
| Three color photometry | Photometrie a trois couleurs |
| Three Colours | Trois Couleurs |
| Three Days Grace | Three Days Grace |
| Three Days of De Panne | Trois Jours de La Panne |
| Three Days of the Condor | Les Trois Jours du condor |
| Three dimensional | Trois dimensions |
| Three Eyes | Trois Yeux |
| Three four time | Mesure à trois temps |
| Three Godfathers | Le Fils du désert |
| Three Gorges | Trois Gorges |
| Three Gorges Dam | Barrage des Trois-Gorges |
| Three Investigators | Les Trois Jeunes Détectives |
| Three Kingdoms | Trois Royaumes de Chine |
| Three Kingdoms of Korea | Trois Royaumes de Corée |
| Three Kings | Les Rois du désert |
| Three Laws of Robotics | Trois lois de la robotique |
| Three letter acronym | Sigles de trois lettres |
| Three Little Pigs | Les Trois Petits Cochons |
| Three Men and a Baby | Trois Hommes et un bébé |
| Three Men in a Boat | Trois hommes dans un bateau |
| Three Mile Island accident | Three Mile Island |
| Three Mile Island Nuclear Generating Station | Three Mile Island |
| Three Mountains of Dewa | Trois monts Dewa |
| Three Musketeers | Les Trois Mousquetaires |
| three o'clock | trois heures |
| Three Places in New England | Three Places in New England |
| Three Preludes | Trois préludes |
| Three Pure Ones | Trois Purs |
| three quarters | trois-quarts |
| Three Represents | Trois représentations |
| Three Rings | Trois anneaux des Elfes |
| Three Secrets of Fatima | Secrets de Fatima |
| Three section staff | Sansetsukon |
| Three sided | Trilatéral |
| Three sided football | Football à trois côtés |
| Three Sisters | Les Trois Sœurs |
| Three Sovereigns and Five Emperors | Les trois Augustes et les cinq Empereurs |
| Three spot gourami | Gourami bleu |
| Three Tales | Trois contes |
| Three Views of Japan | Trois vues les plus célèbres du Japon |
| Three Wise Men | Rois mages |
| Three wise monkeys | Singes de la sagesse |
| Three-age system | Âges préhistoriques |
| Three-awn | Aristide |
| three-card monte | bonneteau |
| three-cornered | triangulaire |
| three-dimensional | tridimensionnel |
| Three-dimensional chess | Échecs cubiques |
| Three-dimensional space | Trois dimensions |
| Three-domain system | Classification phylogénétique |
| Three-finger salute | Ctrl-Alt-Delete |
| Three-phase AC | Triphasé |
| Three-phase alternating current | Triphasé |
