Britain's Guardian newspaper last week reported that its calculations showed that at least 6,500 migrant workers who worked on the stadiums and other infrastructure for the World Cup have died in Qatar in the past 10 years.
"This report has led to a broad discussion in Dutch society and in parliament," said Dutch foreign ministry spokesman Jeroen van Dommelen.
"We have talked before with Qatar about the poor conditions for these workers, but these numbers give the discussion a new meaning. We want to hear Qatar's response before we can think of a new date for the mission."
The trade mission, which was to be held as a video conference due to coronavirus related travel restrictions, was scheduled for March 22 to April 1.
Qatar had not responded yet to the Dutch government's decision, Van Dommelen said.
A majority of parties in Dutch parliament last week called on the government and King Willem-Alexander to stay away from the World Cup next year in protest against the treatment of migrant workers.
Human rights group Amnesty International has repeatedly said the tournament organizer's worker welfare standards were inadequate to prevent abuses and provide timely remedies. It has also accused soccer governing body FIFA of failing to take seriously alleged human rights abuses linked to the event.
Qatar announced changes to its labor laws last August, raising the minimum wage by 25% to 1,000 riyals ($275) a month and scrapping a requirement for workers to obtain permission from their employers to change jobs.
Dutch trade minister Sigrid Kaag, who is running as leader of the medium-sized center-left D66 party in Dutch elections this month, last week said she wanted the Netherlands to boycott the World Cup, though foreign minister Stef Blok said he preferred to keep an open dialog with Qatar.