On loan from Manchester United this season, Rashford can be signed permanently by Barcelona for an agreed €30m fee (£26m).
However, Barcelona are seeking to re-negotiate the arrangement and extend the loan for another 12 months rather than buy him outright this summer.
BBC Sport says Rashford is aware of Barcelona's plans, but isn't panicking.
The England attacker is eager to stay in Barcelona long-term and is confident a solution can be found between the two clubs.
Rashford scored again for the La Liga leaders in Saturday's 2-0 win against Getafe.