The notion of \(\delta \) -Novikov algebras was introduced recently as a generalization of Novikov and bicommutative algebras. It looks like \(\delta \) -Novikov algebras have a richer structure than Novikov algebras. So, unlike Novikov algebras, they have a two-dimensional simple algebra for \(\delta =-1.\) The present paper is dedicated to the study of three-dimensional \(\delta \) -Novikov algebras for \(\delta \notin \big \{0,1\big \}.\) The algebraic and geometric classifications of complex three-dimensional \(\delta \) -Novikov algebras are given. As a corollary, we prove that there are no simple three-dimensional \(\delta \) -Novikov algebras.