According to South Africa's department of international relations, Grace Mugabe didn't have immunity when she entered the country.
In international relations, words matter – and so does the credibility of the speaker.
Donald Trump has put translators and interpreters the world over in an ethical quandary. Sad!
South Korea has a very particular part to play in handling Pyongyang, but Moon Jae-in has a different one in mind.
Kim Jong-il and Bill Clinton looked to have done a deal to curb North Korea's nuclear weapons programme for good. What went wrong?
Only 20% trust the US 'a great deal' to act responsibly. This is a big fall from the 40% level in 2011, when the question was last asked.
What's so 'brotherly' about a major diplomatic spat?
The ongoing diplomatic spat with Saudi Arabia has isolated Qatar from the rest of the Middle East while also undermining the anti-Iran alliance among the Gulf countries.
We asked an expert on diplomacy and foreign policy.
France's president-elect made his name in the global arena, and has a diplomatic bent. Revitalising French foreign policy may well be among his early successes.
Since the late 1970s, East Asia has seen fewer deaths in conflict than any other continent. Can it keep the peace?
Why we can expect Xi Jinping and Donald Trump's meeting at Mar-a-Lago to be a success.
Morocco has been on a massive diplomatic drive, using both its political and economic muscle. Since his coronation in 1999, the king has led over 40 visits to African countries south of the Sahara.
In Kosovo's long struggle to gain international recognition of its statehood, football has helped the country achieve major goals.
The House of Saud's recent efforts to push back against Iran have not paid off. Time to lock in some more allies.
The integration of Turkey into the European Union could have embodied a counter-discourse to the so-called 'Clash of Civilisations'. Perhaps it is not too late.
Tensions in Asia may soon boil over. If U.S. leaders fail to seek pathways to peace, the consequences may be grim, warns former National Security Council member.
There's no middle ground when it comes to a president like this.
Despite talking up her visit to the White House, the British PM has been remarkably quiet on the biggest issue of the moment.
US foreign relations have gone online. And the results are not looking good.