Barca have reportedly earmarked Martinez as the long-term replacement to Luis Suarez, who is now 33, which would see him form a mouth-watering tandem with international team-mate Messi.
Martinez scored 16 goals in 31 games across all competitions this term prior to the suspension of Serie A due to the coronavirus pandemic.
Scaloni thinks his burgeoning talent would only improve playing regularly with Messi, but says Martinez is already playing for a top team who have little incentive to sell.
Speaking to RTVE, Martinez said: "Lautaro today is the fashionable striker, the one who every big team wants.
"He is already with a big team, which competes equally with other teams and it will be very difficult to get him out of there.
"If Lautaro is lucky enough to go and play with a team-mate like Messi at Barcelona, for us, the more they play together, the better.
"Lautaro is a young player with an incredible future. He is strong and has a great desire to succeed.
"I don't want to interfere, but if he does change clubs, I hope he does well."