Malcom left Barca for Zenit last year after a tough 12 months at the Nou Camp.
He told Marca: "The recent controversy at Barça? Barcelona have great players. Barça can stay calm because everyone who plays is a good player and there are a lot of great players out there.
"If Messi's qualities cover Barcelona's problems? Yes, some, yes. But with Leo, there are also (Luis) Suarez, (Antoine) Griezmann, (Ivan) Rakitic, (Frenkie) De Jong, Arthur (Melo), (Arturo) Vidal… there are many other players too. It's not just Leo, it's a whole group. Leo is the best player in the world, he does incredible things sometimes and helps Barcelona a lot.
"That's why when we talk about Barcelona, we talk about Leo."