Haas team principal Guenther Steiner has ruled out Antonio Giovinazzi returning to the American outfit next season, saying the situation was unhelpful.
Giovinazzi split duties between the Ferrari-supported Haas and Sauber last season in the hope of securing a full-time seat for 2018.
But Haas opted to retain Romain Grosjean and Kevin Magnussen, while Sauber announced Charles Leclerc as part of their 2018 line-up alongside Marcus Ericsson.
Giovinazzi will be acting as a reserve driver at Sauber next season, but Haas are not willing to give him the same opportunity to help continue his progression.
"I don't think it helped us or our drivers," Steiner told Denmark's Ekstra Bladet.
"I cannot say how negative it was, but it was not positive. We will see what we are doing next year, but we have not talked about it yet."