When Bosnia and Herzegovina announced on Monday that it would reduce communication with Serbia to the lowest possible level, the phrase did specific work. Diplomatic relations are not a switch with two positions. They are a ladder, and each rung means something different.

This is a short guide to what the steps actually are, roughly in order of severity, and what each one costs the country taking it.

The lower rungs

Summoning an ambassador. The other country’s ambassador is called in to receive a formal protest. It is the mildest available step and is essentially a message delivered with a raised voice. It happens constantly and rarely makes news.

Recalling your own ambassador “for consultations”. Your envoy flies home, ostensibly to brief the government. The quotation marks are doing real work: the consultations are a formality and the point is the empty chair. This is reversible within days and is the standard way to register serious displeasure without breaking anything.

Suspending bilateral meetings and cooperation. Scheduled ministerial contacts stop, and talks on specific files — economic cooperation, infrastructure, security — are halted. This has practical effect, because it stops work that both sides had reasons to want.

Withdrawing embassy staff below ambassador level. The mission is hollowed out while the formal relationship remains. This is roughly where Bosnia has positioned itself, with consular services transferred to embassies in other countries.

The upper rungs

Downgrading the level of representation. An embassy headed by an ambassador is reduced to one headed by a chargé d’affaires. The mission continues; the rank drops. It is a formal, visible demotion of the relationship and is meant to be read as such.

Expelling diplomats. Declaring named officials persona non grata requires no explanation under the Vienna Convention on Diplomatic Relations. Expulsions are usually answered in kind and in equal number, which is why they tend to arrive in matched pairs.

Severing diplomatic relations. The embassy closes entirely. Communication continues through a third state acting as a protecting power, or through international organisations. This is the top of the ladder short of hostilities, and it is rare because it is expensive for the country doing it.

Why cutting ties hurts the country that does it

This is the part that is consistently underexplained, and it is why severance is so much rarer than the rhetoric around it suggests.

An embassy is not primarily a symbol. It issues visas, renews passports, registers births and deaths, assists nationals who are arrested or hospitalised, certifies documents, and supports businesses trading across the border. Close it and those functions do not disappear — they move somewhere less convenient, or they stop.

Bosnia’s case illustrates this precisely. Its consular services move to Zagreb, Podgorica and a consulate in Novi Pazar. Bosnian citizens in Serbia who need documents now travel further. The cost of the gesture is borne substantially by ordinary people who had no part in what prompted it.

An embassy is also an information channel. Diplomats report on what is happening in the country they are posted to, and governments make decisions using that reporting. Withdrawing them means seeing less clearly, which is a poor position from which to manage a dispute.

Does any of it work?

Two views, both held by people who study this professionally.

The sceptical view is that diplomatic downgrades are theatre. They rarely change the behaviour that prompted them, they impose most of their cost on the initiating state’s own citizens, and their main function is domestic: showing a home audience that something was done.

The defence is that signalling has value precisely because it is costly. A state that pays a price to register objection is making a credible statement rather than a free one, and the accumulation of such signals shapes how third parties behave — which in the Balkan case means the European Union, where Serbia is a membership candidate and accession is conditioned on political criteria. On that reading Bosnia’s audience is not Belgrade at all. It is Brussels.

The full story behind this week’s decision is here.

Sources

• Vienna Convention on Diplomatic Relations (1961), including provisions on persona non grata and on protecting powers
• Anadolu Agency and Balkan Insight reporting on Bosnia’s measures, 7 September 2026
• Statements of Bosnian Foreign Minister Elmedin Konaković, 7 September 2026
• Standard diplomatic practice references on levels of representation and consular functions