WASHINGTON — Within days, international monitors will send an inspection report on Iran’s nuclear facilities to governments around the world, touching off a chain of events that could lead to another clash between President Trump and congressional Republicans, or even his own top advisers.

In dry and highly technical language, the report by the International Atomic Energy Agency is likely to show that Iran — with perhaps minor lapses — is largely complying with the 2015 nuclear accord, experts say. And that is where the problems will begin for the Trump administration.

No matter what the inspection report says, Mr. Trump has declared that he expects by October to determine that Iran is violating the deal, adding in late July that “if it was up to me, I would have had them noncompliant 180 days ago.”

Such a declaration could end the nuclear deal, which imposed strict limits on Iran’s nuclear activities for 15 years in exchange for sanctions relief. Mr. Trump, who has called the pact an egregious giveaway to Iran, has the power by himself to scrap it and reimpose sanctions on Tehran.