When "Fortress America" changes it's attitude towards firearms in the hands of it's own citizens and "alien" guests, I may.
Until that time, it is unlikely. We don't see much American participation in our events either, a very few hardcore types only.
Back in my IPSC days, we used to have a LOT of US participation, sometimes comprising a quarter of a major match. Some were Viet Nam vets, notably one who had lost a leg and competed on crutches. He refused any and all concessions, saying that over there, no one made any special allowance for him, so he was damned if he'd let us.
Now he'd likely be disallowed like 150,000 other US vets who have seen combat. Wounded or otherwise, they are deemed 'mentally unfit', especially if they have symptoms of PTSD or have under gone treatment for same.
We'd better not go there or we'll get shut down for political content.