At his reading of Wise Man's fear in Boston last winter, he answered that specific question by saying he really had neglected his wife and baby while he rushed to try and finish book 2 by it's deadline.
As a result, he said he will take his time to write book three.
He did not say any certain time frame.
Hope this helps!
scifi.stackexchange.com/users/2274/Colin
As of February 2017 , the book remains stuck in development hell .
The author, unhappy with the final edited product has apparently taken the book back to the drawing board for extensive rewriting.
Q. Is there a publication date for book 3?
No:
PR:
I would share it if I had it.
Q.
How does he feel the writing is going on book 3 today (as opposed totwo years ago, when he jokingly rated it 3.5 stars out of 5 onGoodreads)?
PR:
It’s at best a star and a half because I dismantled a big piece of itand
haven’t quite put it back together.
Patrick Rothfuss Announces The Name of the Wind Tenth Anniversary Edition and Shares Updates on The Kingkiller Chronicle Book 3
The author has confirmed that the book will end the series, but that future works will be set in the same continuity
Q. Will book 3 will be the last in the series?
PR:
Yes and no.
Book 3 closes this arc of story.
Book 3 will not be the final book set in this world.
Big distinction there!
Q.
But will he wrap everything up?
PR: Think of any series that was wrapped up.
Think of The Lord of the Rings, which has a pretty solid ending:
Was everything wrapped upat the end of the third book of Lord of the Rings?
No.
That’s whathappens in any sort of realistic world, in any sort of realistic storywith realistic characters.
There was some good closure in that book,but what happened with Aragorn, and Minas Tirith, and now that he wasback?
[…] And what about Sam and his kids?
What really happened to theGrey Havens?
Did Frodo every bounce back from that?
What did Gandalftalk to Tom Bombadil about?
There’s a ton of unanswered questions—soyeah,
that’s actually the mark of a good story, and so I won’t beanswering everything, but the truth is, you don’t want me to.
Youmight think you want me to, but you don’t.
And even if you really do,I still won’t.
Just because it’s impossible.
Patrick Rothfuss Announces The Name of the Wind Tenth Anniversary Edition and Shares Updates on The Kingkiller Chronicle Book 3
scifi.stackexchange.com/users/20774/Valorum
Actually, he says in an interview which followed The Name of the Wind that he had both sequels already written and was planning to publish in a regular sequence.
In the interview he speaks of "one per year".
Given that The Wise Man's Fear was published almost 4 years after the first book though, it's anyone's guess how soon the final installment will hit the shelves (and how much editing
he is still planning to do).
scifi.stackexchange.com/users/3450/Philo
I went to a book signing for the Wise Man's Fear, at Borderlands in San Francisco and this question came up.
The authoritative answer for this from Patrick Rothfuss himself was, and I quote, "One huNDRED years!"
He doesn't want to give a close deadline that can be missed, I would guess a couple of years though.
scifi.stackexchange.com/users/5289/KCc
He states that he likes to take a lot of time to edit and that his fans understand that.
Given that, I do know that #2 won't be in paperback until next year, so maybe around then?
It would not surprise me if he times it out like that.
scifi.stackexchange.com/users/2265/Annika Peterson
According to Goodreads, King Killer Volume
Three: The Doors of Stone will be released on 5/1/13.
scifi.stackexchange.com/users/5566/Christy
I read  The Name of the Wind  a few years ago and was grumpy to find out that the following two books had not been published. The second book has finally come out, and I want to know if anyone knows when the third book will be released.   The author's site claims that book 2 and 3 were written a while ago and just needed to go through some editing.
What's happened to 'The Doors of Stone'?
scifi.stackexchange.com
<the-kingkiller-chronicle>
scifi.stackexchange.com/questions/4243
scifi.stackexchange.com/users/2263/Macromika
 The authoritative answer for this from Patrick Rothfuss himself was, and I quote, "One hundred years!"  He has said that he likes to take a lot of time to edit and that his fans understand that. As of  February 2017 , the book was still in development. Patrick Rothfuss says the next book will be out "in one hundred years" as he likes to take a lot of time to edit. However, in Febrauary 2017, the book was stuck in development hell.
Patrick Rothfuss says the next book will be out "in one hundred years" as he likes to take a lot of time to edit.  In February 2017, the book was stuck in development hell.