A member of the Fijian Rugby World Cup squad in 2019, Tex linked up with the Scarlets after the tournament and is now in his second campaign in West Wales.
But he will not be continuing his career in the Guinness PRO14 beyond the end of the 2020/21 season.
“Tex has accepted an offer to join Brive in France and we wish him well for the next chapter of his career,” said Scarlets general manager of rugby Jon Daniels.