JAKARTA, Indonesia — Indonesia’s foreign minister said Monday that it was a “bit mind-boggling” that the Australian intelligence agency had spied on his nation’s trade deliberations with American officials.

“We should be looking out for each other, not turning against one another,” the foreign minister, Marty Natalegawa, said. “We should be listening to one another,” and not listening in.

The New York Times reported on Sunday that an American law firm had been monitored by the Australian Signals Directorate while representing the Indonesian government on various trade issues. A top-secret document, obtained by the former National Security Agency contractor Edward J. Snowden, reported that the Australian agency had notified the N.S.A. that it was conducting surveillance of the talks.

In a news conference here with Secretary of State John Kerry, Mr. Natalegawa refrained from directly criticizing the United States, saying he had been assured that the Obama administration was undertaking a review of its spying practices that he hoped would lead to changes in its approach to spying on Indonesia.