Regarding the United States’ obstinate behavior and the stalemate with many important trading partners, international organizations and financial institutions have issued possible assessments of the trade war and warned of the economic damage caused by the trade war.

The Organisation for Economic Co-operation and Development said that the possibility of a trade war threatened the prospects for global economic growth, after which the world was expected to hit the lowest unemployment rate in 40 years. The risk of a trade war is the primary risk of the global economy. The current global economic interdependence is higher than ever before. Although the number of trade restrictions has been increasing in the past decade, further actions may cause serious economic growth drag. The organization predicts that if the United States, the European Union, and China increase tariffs and the cost of trade increases by 10%, the world economy will decline by 1.4%.

The International Monetary Fund (IMF) issued a report on the US economic policy assessment warning that the U.S. government's adoption of tariffs and other trade restrictions on import measures will pose risks to the global economy and the trading system.

The IMF stressed that the global economy needs to be based on an open, fair, and rules-based trading system. However, U.S. trade policies and measures have raised concerns of all parties. All parties are concerned that these measures will have a negative impact on the United States and its trading partners. . The IMF warned that the U.S. government has rarely used "national security" to defend the import of steel and aluminum products and potential import vehicle tariffs, which opened up a bad head. Other countries may imitate the United States and impose barriers on imports. The rules-based global trading system will be destroyed.

The IMF called for "The United States and its trading partners should take constructive actions to lower trade barriers and resolve trade and investment disputes rather than setting up barriers." According to IMF economists, the Trump administration's focus on the trade deficit between the United States and some countries is dislocated, and the trade deficit “should not be a target”. In addition, the report believes that the US substantial tax cut will stimulate domestic economic growth in the short term, but it will increase the long-term risks of the domestic economy and the global economy.

IMF President Lagarde also stated that the unilateral trade action taken by the United States is destructive and is not conducive to the operation of the global economy and trade system.

Scotiabank issued a report that the U.S. tariff action will hit the Canadian and Mexican economies and reduce the Canadian economy by 1.8%.