Nico Hulkenberg, who often shone in the increasingly-competitive 2013 Sauber, has jumped ship to Force India for 2014.
So Force India refugee Sutil, who has spent his entire grand prix career with the Silverstone based team, now replaces German Hulkenberg at Sauber.
"Sutil is a very good and experienced driver," world champion team Red Bull's Marko told the German publication Sport Bild.
Marko acknowledged Sauber's financial struggle in 2013, but insisted the Hinwil based team remains "reputable and highly professional".
Former F1 driver Gerhard Berger agrees: "It would be a huge loss to the sport if Sauber would ever disappear from formula one.
"I fervently hope they get back to where they should be," he added.
Sauber said it will announce Sutil's teammate "at a later date".