This message was posted on behalf of Intel Corporation
Thank you for contacting the Intel community.
Products built to Thunderbolt and Thunderbolt 2 specifications will work with Thunderbolt 3 via an adapter. - See more at: https://thunderbolttechnology.net/tech/faq
You can find these adapters in websites like Amazon, Newegg, Best buy etc.
Please bear in mind that Intel has not tested this adapters so we cannot guarantee that it will fully work with the NUC.