The 20-year-old will promote his country on social media, sharing photos, videos, links and information.
Meanwhile, the launch of the country's special All-Star mid-February issue ad will coincide with the highly-publicized event where Dončić is expected to be the one of the main draws.
The business promotion project between Slovenia and the Dallas Mavericks club is a result of his extraordinary NBA record and ensuing popularity.
The project aims to raise awareness about Slovenia and its national tourism brand "I feel Slovenia", showcasing the country's investment, business and tourism opportunities.
Apart from the NBA club and the Slovenian Tourism Board (STO), the partnership includes the Government Communication Office (UKOM), the SPIRIT business and tourism promotion agency, and Ljubljana Tourism.
The Mavericks have authorised the communication company Sport Media Focus to manage promotional activities, including a business event titled Texas Feels Slovenia on 12 March following the Mavericks' game with the Denver Nuggets.
Some 15 Slovenian companies will be showcased at the event, held under the slogan I Feel Slovenia Night. The partnership's price tag amounts to some EUR 100,000.
Slovenia's tourism is to be promoted at a minimum of 20 Mavericks' home games, including ten games in this season and another ten in the 2020-2021 season.
"Dončić's arrival to Dallas, Texas, has provided a rare opportunity for Slovenia to promote itself in a place where it is already a rather familiar name compared to the rest of the US," said Sport Media Focus CEO Tomaž Ambrožič.
He believes the country will capitalise on that and forge long-term ties.
STO head Maja Pak said that Slovenia would be promoted as a sustainable, green country boasting 5-star experiences in the US market, known for its big spenders.