The Inter Miami playmaker has scored all five of his team's goals in their wins over Algeria and Austria as Argentina have booked their place in the knockout rounds with one group phase match remaining.
"Leo will start on the bench," Scaloni said in response to a question from 91-year-old Argentine radio journalist Enrique Macaya Marquez, who is working at his 18th World Cup.
"I'm answering because you deserve a sincere answer.
"Leo will come in a little bit later."
Argentina have already secured pole position in the group and Scaloni dismissed suggestions he was fielding a weakened side with one eye on the challenges that lie ahead in the knockout rounds.
"Those that are playing tomorrow deserve to play, they are part of the team," he said.
"All the effort we've put in in training is because of them, that's why we're here. They are making every effort when they're not playing.
"I'd love to give everybody minutes and when I have the chance I do and it's because they deserve it. They are fantastic players too.
"The dream as a coach is to have the team perform the same way, independent of the players who comprise the team.
"If you are wearing the jersey and playing it doesn't matter if you're playing in a game of significance for the points or not. You're going to do your best to win, nothing changes. We're in the same way as we were on day one."
Argentina are facing a Jordan side that have already been eliminated after suffering back-to-back losses in their first appearance at the World Cup and Scaloni is expecting to face a team set up defensively in their final match at the tournament.
"Jordan normally play with five defenders and we're open to the possibility that, if we're facing some difficulties, we might have to move slightly differently," he said.
"We might be prepared to do something differently if things are challenging, depending on how our opponent plays."
