The Real Madrid veteran is looking to skipper his country through to next year's finals in its last major pre-Qatar 2022 World Cup run-out.
Four years on from reaching the final at Russia 2018, Modric is among the elder statesman of the world game on the pitch, at 37, with many wondering if this year's tournament will be his international swansong.
But speaking ahead of their Group A1 encounter at Stadion Maksimir, the playmaker has poured cold water over any imminent exit talk and suggested whatever decision he makes will likely wait for the new year.
"I'm not thinking about that," Modric stated. "I haven't made any decisions. I'm focused on the Nations League.
"We have an opportunity to qualify for the last four, then we have the World Cup and then we will see.
"I'll try to make the best decision. At that that time, I'll talk with our head coach, with the people I trust. I'm not thinking about that at the moment."
Between Croatia's hopes of a finals spot stands Denmark, atop Group A1 and out to follow up last year's Euro 2020 semi-final with another impressive tournament run.
Modric is under no illusion what challenge they possess, saying: "Denmark is an excellent team. I think the biggest strength is the unity of the group itself.
"There are many excellent players, like [Christian] Eriksen or [Pierre-Emile] Hojbjerg from Tottenham. [But] their biggest strength is the group.
"[It is] the togetherness, the fighting spirit, and we need to perform the same way if we want to achieve a good result."