He had been due to arrive in New Zealand later on Friday with England's other specialist Test players to begin preparations for the three-match Test series from 5 March.
When America and other countries started to receive intelligence reports that Pakistan was making final preparations for a nuclear test, attempts were made to persuade its government not to go ahead.
This week Glamorgan revealed that there was a four-week delay in laying new turf but insisted that would not affect preparations for the first Ashes Test.