Brentford winger Stuart Dallas has withdrawn from the Northern Ireland squad just 24 hours after being called up by manager Michael O'Neill.
Dallas, whose only cap came three years ago against Wales, has an injury and will miss the European qualifier against Hungary later this week.
His place in the 27-man training squad goes to Preston's Andy Little.
And later on Tuesday evening Liverpool defender Ryan McLaughlin also withdrew from the squad.
O'Neill will reduce the party to 23 before they leave for Budapest ahead of Sunday's Group F clash.