The only real option is to block visits from a specific country. You can do this either with .htaccess or through Cloudflare if you're using it. This will automatically filter out around 90% of AdSense traffic from that country.

I dont want to block the site to that specifc country only adsense.
.htaccess will block the whole site ?

The ads are not being served from the country that is paying Google to show them, so htaccess/Cloudflare can't do anything to block the ads. In the AdSense user interface you should find a place to block specific advertisers, but no way to block all ads from a specific country.

Google updated their blocking policy last October, see this post: [webmasterworld.com...]

Now you can block “Authorized Buyers” but not "Ad Networks".

If you want to block a country to receive ads, you can create a php condition in your website/CMS script, if country = X: then no ads, else show ads. With the help of a free GeoIP service to determine the country.

If you want to block a country from generating ads on your websites, no there is no such option for the moment. You can only block brands.

You can link adsense to Google Ad manager and create ad units to show adsense ads instead, this way you have more control over where and when the ads should be displayed. But I think this will not work with Auto ads.

I have tried google ads manager but i cant seem to link my adsense account only analytics.
Any reason why that may be the case ?

Google lists their Ad Manager resources here: [admanager.google.com...]

You might find instructions there.

@sroupy I think if you are using the same google account for both ad manager and adsense you dont have to link it