Newcastle, meanwhile, are extremely unlikely to have any of their players called up for Socceroos duty in March qualifiers against Iran and UAE.
"I don't know how the game's going ahead with the number of (our) players that are missing," the 35-year-old Smeltz said.
"For me it's an easy one - you just reschedule the game."
The Newcastle match takes on added significance for the Nix by the two sides' proximity on the A-League ladder, sitting just one point apart at the end of round 22.
A win against the Jets would give seventh-placed Wellington's finals aspirations a considerable boost, while defeat would almost certainly spell finals failure.
The club has requested a date change with the FFA, according to Smeltz, but is yet to receive a response.
All Whites boss Anthony Hudson confirmed on Sunday that he would take his strongest possible squad to Fiji, where they will be runaway favourites.
Smeltz hoped he could wriggle his way back into the squad for the home-and-away fixtures, having not played for his country since September 2015.
A seat on the plane for this year's Confederations Cup in Russia also beckons.
"For me it's about focusing each week and playing the best I can and if I tick those boxes then there's no reason I can't be in the squad," the 51-cap Kiwi said.
Smeltz also threw his weight behind the international recall of Ipswich defender Tommy Smith, saying his quality would always be valuable.
-AAP
