Isaidub is a website known for providing dubbed versions of movies and TV shows in various languages. If you're looking for "The Chronicles of Narnia 3" (assuming it refers to "The Voyage of the Dawn Treader") in a dubbed format, Isaidub might have it, but be sure to verify the availability and legality of such streaming sites in your region.
in Tamil, though these versions are not legally authorized by the film's distributors. Legal & Safe Viewing Alternatives the chronicles of narnia 3 isaidub exclusive