Messi is understood to be considering his international future and is expected to refuse any call-ups for at least the remainder of 2018, but Scaloni hinted that the other selections have been made with one eye on the future of the national team.
"No player told me he did not want to come to the Argentina national team," Scaloni told The Guardian.
"All the decisions we have taken are for the good of the national team and to try to see what we can bring to the future. We have very clear in our minds that we need to add people to this new adventure.
"I spoke to the majority of the players and they all gave me their availability. We feel that we need these players right now. I feel it's the time for renovation. I'm convinced that the time to call up these players is now."
Both of Argentina's upcoming friendlies - their first games since their last-16 exit at this summer's World Cup - will be played in the United States.