Butland is widely expected to travel with the England squad to this summer's tournament in Russia.
The stopper's club future is far from secure, however, following Stoke's relegation from the Premier League.
The 25-year-old is closing in on 100 appearances for the Potters following a move from Birmingham City, and a decision on his future will not be made until after the World Cup.
"My next focus is the World Cup and beyond that, we'll have to wait and see," Butland told reporters.
Butland, who has previously been linked with Liverpool and Wolverhampton Wanderers, was in tears following Stoke's 2-1 defeat to Crystal Palace on Saturday afternoon.