Javier Rojas Alvarez will not be returning to the Cornish Pirates.
Having spent two years in Cornwall, the fly-half departs after undergoing a knee operation.
The Argentine international joined the Pirates in April 2018, making 42 appearances and scoring 279 points in his two seasons.
Alvarez, who won five caps for the Pumas between 2012-14, most recently vs Chile, said: “Wherever my career has taken me, I try to learn as much as possible, which was certainly so at the Pirates.
“Learning so much more than just rugby, my thanks are extended to the many people who supported me and who I got to know. It was a great experience and a time that I’ll never forget.
“With the support of the many fine people in the community of Cornwall, I wish the Cornish Pirates all the very best in the future for the club to fulfil its ambition.”
Born in Tucuman, Alvarez has represented his country at both 15-a-side and Sevens, including competing at the 2016 Summer Olympics.
Throughout his club career he has had spells at Universitario Rugby Club de Tucuman, Pampas XV in South Africa, French club Sporting Club Albigeois and Italian side Rugby Viadana.
