The country remained diplomatically isolated.

这个国家在外交上仍然是孤立的。

《牛津词典》

With the entire international community now pointing out that the Taleban threat to Pakistan is dire, Islamabad finds itself diplomatically isolated as it continues to fail to respond.

BBC: Disarray on Pakistan Taleban threat

Might, for example, Washington policymakers decide that America could have avoided being quite so isolated diplomatically had it paid more attention to its allies' sensitivities?

ECONOMIST: Bagehot