Carragher was disappointed with Rashford in last night's 0-0 draw between England and Croatia.
"The way England play, Rashford plays narrow - he's almost like a striker," he told Sky Sports.
"He's not wide, he's not hugging the touchline like in an orthodox 4-3-3. Southgate wants his wide players to tuck in.
"Rashford is almost playing like a striker and getting into striking positions. Unfortunately for England he's missed the chances - he's got to take them."