A temporada 3 de Republic of Doyle foi transmitida em CBC (CA) de mercredi 11 janvier 2012 a mercredi 4 avril 2012. Consiste em 13 episódios, o primeiro se chama "Streets of St. John's" e o último "Under Pressure"..
The sleepy port city of St. John's, Newfoundland, is changing. While an influx of oil has flooded its coffers, it's also brought to the surface the corrupt -- where there's cash, there's trash, after all. And doing his part to clean things up is private eye Jake Doyle, who, with the help of his dad and partner at the Doyle P.I. Firm, takes on all cases -- with the odd homicide thrown in just to keep things interesting.