Scarlets have released Tomas Vallejos to allow him to play for Pampas in the Vodacom Cup in South Africa.
The 27-year-old second-row forward made only eight appearances for Scarlets after joining from Harlequins, but the club have agreed to terminate his contract early.
The lock will now join up with development side Pampas as he hopes to cement a regular place in the Argentina international squad.
Scarlets head coach Simon Easterby said: "We have supported Tomas' wish to play with Argentine side Pampas to allow him to get a substantial period of game time which he has unfortunately not had with us.
"Tomas joined us later in our season after his commitments with the Championship and had to play catch up to an extent within the squad dynamic.
"Building up depth and creating strong competition for places is healthy for our region, however it has meant that Tomas has not had a great deal of game time with us.
"We appreciate this wish and respect his decision to move and thank him for the spirit and enthusiasm he has shown for Scarlets rugby. We wish him all the best in the Vodacom Cup and his future aspirations in rugby."
Vallejos added: "It is important to me to be able to take up this opportunity as the Vodacom Cup will ensure that I get some more rugby under my belt which is what I need right now.
"I've not made any firm decisions about what I intend to do after the Cup competition in South Africa and there are a number of options available for the future."