David Simon had claimed last month that plans were afoot for a truncated final season to wrap up the New Orleans-set drama, which stars Melissa Leo, Khandi Alexander and Steve Zahn.
Simon said at the time: "We are going to be back for a season 3.5. HBO, upon viewing the ten [episodes from season three] that we gave them and what we've done, they want to see the end of the story.
"They fought very hard to give us half a loaf. We're going to take it and run."
According to The Hollywood Reporter, HBO have officially confirmed Simon's statements, and production is due to begin on the final episodes in a little over a week.
The drama is well-regarded by critics, but has consistently been the lowest-rated drama on the network for its past two seasons, and the final season was cut in half at the request of HBO bosses.
Simon, who also wrote and produced the critically-lauded The Wire and Generation Kill for the network, has said recently that he is considering retiring from television, saying that the projects are "exhausting to undertake".
Treme's third season is currently airing on HBO in the US and on Sky Atlantic in the UK.
Watch the Treme season three trailer below: