Nico Hulkenberg's manager confirmed on Wednesday that the German won't be able to take Kimi Raikkonen's seat at Lotus for the final two races of the season.
The Sauber driver was rumoured to be in Enstone for a Lotus seat fitting, but instead opted to remain with his current employers for the grands prix at Austin and Interlagos.
"We had an offer from Lotus and are available. We have discussed it, but we decided that Nico will drive the last two races with Sauber," Werner Heinz told German newspaper Bild.
Raikkonen, the 2007 World Champion, will miss the last two races of the season after the Finn decided to undergo back surgery before completing his move to Ferrari for the 2014 season.
Despite being uninterested in joining Lotus for the final two races of the 2013 season, Hulkenberg - along with Pastor Maldonado - remain the favourite to replace the Finn for next year's campaign.
With Hulkenberg out of contention for the Lotus berth in the US and Brazil, third driver Davide Valsecchi is the most likely candidate to replace Raikkonen.