INTENDENTE ALVEAR, Argentina — Fallout from the mysterious death of a federal prosecutor raised diplomatic tensions between Argentina and the United States on Tuesday, on the eve of a controversial march in the prosecutor’s honor that has fueled unease between the government and parts of the judiciary.

In a letter to Secretary of State John Kerry, Héctor Timerman, Argentina’s foreign minister, said the country should not tolerate being a “theater for operations of politics, intelligence or, even worse, more serious actions, because of conflicts that are completely unconnected with its history,” adding that Argentina had no strategic interests in the Middle East.

Days before his death on Jan. 18, the prosecutor, Alberto Nisman, had accused Mr. Timerman and President Cristina Fernández de Kirchner of trying to derail his investigation into the fatal bombing in 1994 of a Jewish community center in Buenos Aires by conspiring to shield Iranians from his charges that they had planned the attack.

“Argentina is observing with great concern the increasing frequency with which many countries are used as stages for the intervention of other states to set out disputes in function of their own geopolitical interests,” Mr. Timerman wrote in the letter, which he read aloud at a news conference. “My country rejects these actions and tries to ensure they do not happen in its territory.” Mr. Timerman, who sent a near-identical letter to the foreign minister of Israel, reminded foreign diplomatic officials that they should not interfere in Argentina’s domestic issues.