The German goalkeeper decided against adding fuel to the rumours that he may join the Spanish club, who are believed to be looking for a replacement in the likely event that Victor Valdes leaves at the end of the season.
"I don't know, right now I'm focused on Borussia, which is the most important thing for me," he told Catalan newspaper Sport. "I owe this club, which I've followed since I was little and this now is the main thing.
"It's nice to hear that interest exists, but that's all I can say at the minute. I'm happy to be in Monchengladbach and we'll see what happens.
"What has to happen will happen. I'm preparing every day to be the best goalkeeper I can and try to take it day by day."
Ter Stegen has played three times for the German national team.