That tiny German company making lab equipment which happens to be absolutely essential for your company? Their shipments aren't getting through customs anymore, and dealing with the additional paperwork is way more than the two-and-a-half people in charge of shipping can handle on top of their regular duties. The US is only 5% of their market, so rather than drown in an attempt to serve the US they'll just suspend shipping until the US fixes itself, and serve the other 95% of the world instead.

Can't do your job without a replacement MacGuffin? Oh well, sucks to be you! Not our problem that your company is going to lose millions, take it up with your government.