The transfer tests were due to start this Saturday but have now been pulled because of the rapid spread of a new variant of the Coronavirus.
“Children have been put through 12 months of all that hard work only to have it all called off at the last minute,” Collin Torrens, principal of Lisnagelvin Primary School said.
Speaking to BBC News NI, Mr Torrens said he only heard the announcement from one of his P7 teachers.
“No matter what decision was made today it was always going to be wrong on so many levels.
“They [school children] have worked over Christmas, they have worked over holidays and this really should have all been sorted in May,” he said.
“It really is shocking it took this long.”