ISLAMABAD, Pakistan — At the urging of the Trump administration, an international task force has decided to place Pakistan on a terrorism-financing watch list, a decision that has stunned and alarmed Pakistani officials and one that could deliver a major blow to the nation’s economy.

The Paris-based organization, the Financial Action Task Force, which conducts much of its business in secret, concluded its meetings on Friday with no public statement on Pakistan’s status.

But Miftah Ismail, a financial adviser to Pakistan’s prime minister, Shahid Khaqan Abbasi, said he expected Pakistan to be placed on the list in June, after the country and the task force agreed on an action plan.

In addition, a former high-level Pakistani official, speaking on the condition of anonymity so as not to jeopardize relationships with current negotiators for the government, said that members of the task force had decided to place Pakistan on the list as of June.