Mazarra warned that the AMC survival series will "have a very accelerated pace" when it returns in October, meaning that fans need "to work hard to keep up".
"I guarantee people will say the show is moving too fast and it's too packed," he told TV Guide. "'There's too much going on, I can't take it, it's too exciting'.
"Trust me, I know people are going to say that because we are really hitting the ground running... the audience will have to work hard to keep up because we have a very accelerated pace of storytelling."
On whether season three will keep with the dark themes of the corresponding comic books, Mazarra stated: "We are a bold show. We do take chances. We are committed to what we want to do and we are not going to pull punches."
Mazarra also predicted that The Walking Dead will be a better show in season three because he has learnt to "trust" the fans.
"The lessons I've learned are: Keep it scary, trust the audience and listen," he said. "I'm listening to the fans. I'm listening to a fantastic team of producers. I'm listening to one of the most talented room of writers I've ever had the pleasure of working with.
"I'm just fortunate enough to work with a lot of different talented groups of people who are all adding to the vision of the show."
Walking Dead creator Robert Kirkman previously declared that season three will "blow people away", while lead actor Andrew Lincoln (Rick Grimes) has described the new episodes as "insane".
Watch a sneak peek of The Walking Dead season three below: