"diplomatic debate" is correct and usable in written English.
You can use it to refer to a discussion involving people from different countries who are attempting to reach a resolution on a particular issue. For example: "The diplomatic debate between the two countries centered on questions of regional security."
The developments came against a background of quickening diplomatic debate over possible outside help for the Libyan rebels, who have made increasingly anxious pleas for intervention that have, so far, produced none.
Both the Chinese and Russian Air Force have similar doctrines but it has not been a subject of diplomatic debate for a good two decades, since they are naturally applicable only in times of war.
There he addressed civic groups in a campaign-style setting, using simple metaphors and concrete examples in a fatherly reminder of a president's ability to rise above elite diplomatic debates -- and of the people's final judgment of a president's fate.
Absent any diplomatic progress, the debate turns to domestic issues, and elections hinge on perceptions of the political system itself and the legitimacy of its democratic institutions.
Brokered during World War I, Sykes-Picot was a backroom deal, not a publicly debated diplomatic treaty.
Being so immersed in the deliberations has also given Laing and Mearns a unique perspective on the diplomatic wrangling as debates heat up in the final days of the summit.
The meeting coincided with the official start in Islamabad of a parliamentary debate on diplomatic relations with Washington.
And what that role could or should be is the subject of much debate in diplomatic and academic circles and among immigrants.
The Kennedy administration temporarily cut diplomatic ties and briefly debated whether to support efforts to remove Duvalier from power but decided against it.
President Bush will send a senior American diplomat to North Korea early next month, ending 20 months of internal debate and then diplomatic delays on opening of talks with a country that Mr. Bush included with Iran and Iraq as part of an "axis of evil".
Mr. Rumsfeld's vocal skirmishing with Moscow is also connected with a broader trans-Atlantic debate -- and diplomatic rivalry -- over a number of pressing security questions ranging from NATO's role in the Balkans, to how to maintain sanctions on Iraq and how to shape a new European defense force outside the NATO alliance.
