The Bianconeri have been heavily linked with a loan move for the Monaco forward, who is reportedly unsettled at the Stade Louis II, with Leonardo Jardim's men having lost their first two games of the new Ligue 1 season.
However, Marotta has explained that, while Juventus could sign another attacker before the close of the summer transfer window, they will not bring in a big-name player.
"We're lacking a forward, a second striker in a compartment that already gives us many certainties, but it will not be a [player with] a major profile," the Juve director told Sky Sport Italia.
"We will not make big investments. But [one player] could arrive in the final hours of the window."
It has also been reported that Juventus are considering a move for Benfica captain Luisao but Marotta insists that they are not interested in the centre-back, as he feels that the Italian champions are well stocked in defence.
"We have never contacted the player," he declared. "But this is the world of football.
"[Andrea] Barzagli is recovering quicker than expected [from injury] and [Luca] Marrone has shown himself to be comfortable in defence, so we could stay like this."
Juventus kick off the defence of their Serie A title with a trip to Verona to take on Chievo on August 30.