Campos Racing will still field three cars for this weekend's World Touring Car Championship Macau finale after last-minute deals with Nikolay Karamyshev and Michael Soong.
Twenty-four-year-old Russian Karamyshev has already raced for the team at Moscow Raceway and Porto, claiming a best result of 16th from the four races.
Soong, 33, will meanwhile be making his series debut. The Hong Kong driver has been competing in the China Touring Car Championship this season.
Campos had to find late two late replacements after Fernando Monje withdrew due to family reasons and Andre Couto opted to compete in the Audi R8 LMS Cup instead of the WTCC.
The pair will join Campos regular Hugo Valente, and swell this year's WTCC Macau field to a record 34 cars.
The largest ever field remains the 35 cars entered for Monza in 2006, although that included Italian Touring Car competitors racing on the same weekend.