According to Snopes, the hoax about "The Twilight Saga: Breaking Dawn - Part 3" concerned its supposed release date in November 2015. However, the International Business Times reported that the news of the movie originated from a satire site called Daily Buzz Live, thus making the story fake.
The Daily Buzz Live report went live in late 2014 with supposed excerpts from the script, which made the story seem more real. One such excerpt appeared to be between the characters of Jacob Black and Renesmee, purportedly showing their love affair. The initial reaction from Twilight fans on Twitter indicated people did indeed believe the report and tweets about it seemed largely positive.
Daily Buzz Live does not purport to be a news source, posting a disclaimer on its site that says most articles are inspired by real news, but some articles are indeed complete fiction. It did not, however, indicate specifically the false nature of "The Twilight Saga: Breaking Dawn - Part 3" report.
Previously, "The Twilight Saga: Breaking Dawn - Part 2" was released in 2012 based on the Twilight books by Stephanie Meyer. "The Twilight Saga: Breaking Dawn - Part 1" was released in 2011. The "Breaking Dawn" novel did not cover the love story between Jacob and Renesmee, which caused some fans to say they wanted a book before a movie.