Is an Arduino Uno made in the USA compatible with SunFounder shields?
Use the latest official Arduino IDE : Arduino IDE

Every Arduino Uno and all the clones are compatible. Some clones have the CH340G usb-serial chip and require an extra driver. If you look very hard, you might find an Arduino Uno board that is not version 'R3' and does not have SDA and SCL near the USB connector, or does not have the polyfuse for USB 5V, or uses an ATmega328 instead of a ATmega328P. There is a chance of maybe 1 in 10,000 that you find a wrong Uno board, and in most cases those are still compatible.

Do you mean the SunFounder RGB Matrix Driver Shield? That should be no problem.