The author uses a fixed point theorem due to R. I. Avery and A. C. Peterson [Comput. Math. Appl. 42, No. 3–5, 313–322 (2001; Zbl 1005.47051)] to establish the existence of at least three positive solutions of some boundary value problem to third order impulsive functional differential equations with \(p\)-Laplasian. The cases of delayed and advanced arguments are considered separately.