Carter, who is still contracted to the Kolebco Steelers in Japan, signed for Racing 92 on a medical joker deal in mid-February as a replacement for South African first-five Pat Lambie, who was forced to retire due to concussions.
According to reports, the short-term contract was set to earn the former All Blacks playmaker between €25,000 (NZ$41,847) and €35,000 (NZ$58,587) a month.
