Tiger Woods‘ plane is back in Switzerland where he recently attended a rehab program … TMZ has confirmed.

The golfer’s private jet left Florida Saturday night and landed in the European country Sunday.

We don’t know why Woods’ plane landed in the country … and we’ve reached out to his team for more information — but it’s an interesting place to go given he just recently checked himself into rehab there.

Remember … after Woods was arrested and charged with DUI last month, he entered a rehab program in Switzerland — going overseas to protect his privacy.

However, we learned he was flying back to the United States earlier this month … touching down in Palm Beach, Florida.

We didn’t know at the time if that meant his rehab was completely over … and, given he’s now headed back, there seems to be a chance he’s still working on his recovery.