The Newcastle United loanee had impressed during his time with the Glasgow club.
Newcastle United forward Haris Vuckic, who impressed in Rangers' promotion attempts while on loan this season, has been told that staying at Ibrox will be a major hindrance to his international career.
Slovenia manager Srecko Katanec was scathing of the standard of football at Rangers and in the Scottish Championship, in quotes appearing in the Chronicle, telling 22-year-old Vuckic that he would not be adding to his single cap if he was to decide to stay in Glasgow.
“I was disappointed, not just with him, but with the quality of the league he was playing in," Katanec is reported as saying.
“Haris played for Rangers in the second division in Scotland.
“I would have thought Rangers would have had a better team.”
Vuckic was the most accomplished contributor to the Gers cause as he and four other Newcastle United players arrived at Ibrox in February in an attempt to take the famous Scottish club back into the top flight.
Kevin Mbabu, Gael Bigirimana, Shane Ferguson and Remie Streete all headed north of the border from St James's Park, but while the other players barely featured, Vuckic scored 9 times in 22 appearances, helping Rangers to an ultimately fruitless playoff final with Motherwell.
However, any hopes Rangers may have of signing the Slovenian, who has one year remaining on his Newcastle deal, on a permanent deal seem to have been undermined by the comments from Vuckic's international manager.