Rashford, who has already represented the England senior squad, made his U21 debut this week and scored a hat-trick in the 6-1 win over Norway.
It is understood that Rashford is set to be called up by Three Lions boss Sam Allardyce for next month's 2018 World Cup qualifiers but Redmond, as good as Rashford is, says Gareth Southgate's squad will cope without him.
"Marcus has done well so far. But this was his first game and we have done well without him," Redmond told the Daily Mirror.
"So we can cope, we have other strikers and players who can come in. It is a very strong squad.
"If he comes away with us again it will be an added bonus, if not we've got the players to deal with it."