It happened last year, and once again it looks like The Clone Wars will be expiring from Netflix.
Today Netflix in the US updated to show that Star Wars: The Clone Wars is only available until 6/7/2017. Meaning unless something happens prior to that, the series will be removed from the service.
This happened last year, but Netflix was able to renew their contract to stream the series at the last minute. It’s also possible that this is just a glitch and it’ll resolve itself soon. But as of right now it looks like we have only a few more weeks of Clone Wars streaming.