Bertie Carvel will return to play Simon, whereas Tom Taylor will seem as Tom within the BBC drama.
The first series of Doctor Foster noticed Gemma, a physician within the fictional city of Parminster, uncover her husband Simon was having an affair.
It aired in 2015, and was adopted by a second series in 2017, with almost 10 million individuals watching the finale.
Both series received National Television Awards and Jones received a finest actress on the Bafta TV Awards in 2016.
Filming on the third series is due to start in Hertfordshire later this spring, the BBC mentioned, with Mike Bartlett returning as author, creator and government producer.
Bartlett mentioned: “I always hoped that we’d get to tell the final part of Gemma’s story, which is about a woman seeking justice in an unfair world.”
He mentioned there can be “secrets, betrayals, vengeance and perhaps one last dinner party”, referring to a well-known scene from series two.
A broadcast date for the final series can be introduced in the end.
