The Brazil international joined the Ligue 1 champions in July 2013 from Roma, but has failed to become a regular starter, with compatriots David Luiz and Thiago Silva PSG's favoured centre-back pairing.
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Marquinhos has made just 12 league appearances this term, starting only seven, and Premier League duo Chelsea and Manchester United are reportedly monitoring his situation.
The 21-year-old insists he wants to stay and fight for a place in the PSG team, but may consider his position at the end of the season.
"Like everyone else, I always want to be a part of the starting line-up," he told JDD.
"But we all must respect the choices of the coach and management.
"I will continue to work to get my place. But it's true there will come a moment where I am older. You cannot just get used to sitting on the bench.
"There are six months left for PSG to win titles. After that, we'll see what happens."