The 20-year-old played for Spain in the 2-1 win over Georgia on Sunday.
Garcia will be a free agent in the summer and Barcelona have been linked with his signature.
But the centre-back insists he is only worried about Spain's next game against Kosovo.
He said, via Mundo Deportivo: "I'm focused on what concerns me, now with the national team there is a very important match against Kosovo coming up, and then what comes will come.
"I don't know if it will be Barca."