Connecting Mac Book Pro 2017 to 2 Projectors via USB C
According to Apple's Technical Specifications  13” 2017 MacBook Pro is able to support 2 external displays.

Simultaneously supports full native resolution on the built-in display at millions of colors and:

One display with 5120x2880 resolution at 60Hz at over a billion colours
Up to two displays with 4096x2304 resolution at 60Hz at millions of colours
Up to two displays with 3840x2160 resolution at 60Hz at over a billion colours


So, three total screens is a yes, four or more is a no. What’s undetermined is if you can run closed clamshell and have three distinct and active external displays and nothing on the internal display.