No explanation has been provided by Charouz regarding the driver change but Simmons was also absent from last week’s in-season test at Barcelona, where Schumacher was first called in as his replacement.
Simmons, who finished second in last year’s British F3 series, endured a torrid start to his first full campaign in FIA F3 last month, finishing 18th and 19th across the two races in Bahrain.
