BRUSSELS — The European Commission demanded full adherence to a 2025 EU-U.S. trade agreement after the U.S. Supreme Court struck down President Donald Trump’s sweeping global tariffs on Friday. Trump responded by announcing temporary 10% tariffs on all imports, then raised them to 15% on Saturday.

The Commission, which handles trade negotiations for the 27 EU member states, called for Washington to provide immediate clarity on its post-ruling plans. “The current situation is not conducive to delivering ‘fair, balanced, and mutually beneficial’ transatlantic trade and investment, as agreed to by both sides,” the Commission stated in a release Sunday.

EU officials stressed that products from the bloc must retain the competitive edge outlined in the deal, with no tariff hikes beyond the agreed 15% ceiling for most goods. Exceptions include zero tariffs on aircraft and spare parts, while steel and other sectors face separate rates. The pact prompted the EU to drop import duties on numerous U.S. products and abandon planned retaliatory measures.

“In particular, EU products must continue to benefit from the most competitive treatment, with no increases in tariffs beyond the clear and all-inclusive ceiling previously agreed,” the executive arm of the EU said. Unpredictable levies, it added, sow disruption and erode confidence in global markets.

This sharp rebuke marks a shift from the Commission’s measured Friday statement, which merely noted it was reviewing the court decision and consulting U.S. counterparts. Sunday’s language highlights growing frustration in Brussels over Trump’s quick pivot to new duties.

EU Trade Commissioner Maros Sefcovic raised the issue directly with U.S. Trade Representative Jamieson Greer and Commerce Secretary Howard Lutnick during talks on Saturday, according to the Commission.

The Supreme Court’s Friday decision nullified Trump’s prior global tariff regime, which had covered imports from nearly every trading partner. Trump’s administration framed the new 15% across-the-board rate as a stopgap while crafting a replacement policy. Critics, including EU leaders, argue it violates the spirit and letter of the 2025 compromise that stabilized transatlantic commerce after years of tension.

That deal capped U.S. tariffs at 15% on most EU exports, a level both sides accepted to avert a broader trade war. The EU, in turn, eased duties on American whiskey, motorcycles, and jeans, among other items. Retaliatory threats over steel and aluminum duties also dissolved under the agreement.

Commission spokespeople declined to specify next steps but hinted at readiness to defend EU interests. “We expect our partners to respect commitments made,” one official said. Markets reacted warily, with European auto and machinery stocks dipping amid tariff uncertainty.

The episode highlights persistent frictions in U.S.-EU trade relations, even after last year’s detente. Trump’s tariff enthusiasm has long strained ties with Brussels, which views such measures as blunt tools that hit consumers and exporters alike.