I think no ....... but a few clan tourneys are going rare

There aren't official tournaments. But there are quite a few player organized clan or team tournaments with prizes.
Most of them are posted in the tournaments and challenges section on the uberstrike vanilla forums: forum.uberstrike.com
Here's the link to the designated section: http://forum.uberstrike.com/categories/tournaments-challenges
There's also an group called UTAC that helps people organize tournaments, more info in that same section. Link: http://forum.uberstrike.com/discussion/58843/utac-uberstrike-tournaments-and-challenges-updated-20-01-2015#latest
PLus, there is soon going to be a group called ULTIMUM organizing high level tourneys in uberstrike, they're looking for organizers at the moment, link: http://forum.uberstrike.com/discussion/60083/ultimum-is-looking-for-organisers#latest

Ok thank you