Leeds United trio Tresor Kandol, Lubo Michalik and Seb Sorsa have all been called up for international duty later this month.
Striker Kandol is in line for his first cap for Congo in their clash with Algeria on 26 March.
Michalik is in the Slovakia squad for a friendly the same day, while fellow January signing Sorsa is in the Finnish squad for their game in Bulgaria.
It means Leeds' visit to Huddersfield on 25 March has been moved to 15 April.
Meanwhile, midfielder Jonathan Douglas is back in training after his lengthy injury lay-off.
The Republic of Ireland international has been out since December with a knee injury, but played over an hour in a specially arranged game against the club's youngsters on Tuesday.