From the Vatican.va website:
Communiqué on articles regarding the “Third Secret of Fatima”, 21.05.2016
Vatican City, 21 May 2016 – Several articles have appeared recently, including declarations attributed to Professor Ingo Dollinger according to which Cardinal Ratzinger, after the publication of the Third Secret of Fatima (which took place in June 2000), had confided to him that the publication was not complete.
In this regard, Pope emeritus Benedict XVI declares “never to have spoken with Professor Dollinger about Fatima”, clearly affirming that the remarks attributed to Professor Dollinger on the matter “are pure inventions, absolutely untrue”, and he confirms decisively that “the publication of the Third Secret of Fatima is complete”.
There have been many claims made since 2000 about the third secret, as if some part of it were still hidden. Such claims are baseless.
— Ronald L. Conte Jr.