Ireland and the ICJ Genocide Case Against Israel, Explained

Did Ireland join the ICJ genocide case?

Not in the way people usually mean it. Ireland is not a co-applicant alongside South Africa, and it is not a party to the case at all. What Ireland did, on 6 January 2025, was file a declaration of intervention in *Application of the Convention on the Prevention and Punishment of the Crime of Genocide in the Gaza Strip (South Africa v. Israel)*, the Court's case No. 192.

That is a narrower role, and it is worth being exact about it, because the difference shapes what Ireland can and cannot say to the Court. If you want the wider picture of why Irish governments and Irish people have taken the positions they have, start with our Palestine learning hub and the explainer on why Ireland supports Palestine.

What South Africa's case is about

South Africa filed its application on 29 December 2023. It alleges that Israel, in the Gaza Strip, has breached its obligations under the 1948 Genocide Convention. Both countries are parties to the treaty, and South Africa relies on its Article IX, which sends disputes about the Convention to the International Court of Justice.

Nothing has been decided on that central question. What the Court has done so far is order protective steps. In its Order of 26 January 2024 it told Israel to take all measures within its power to prevent acts within the scope of Article II of the Convention, to ensure its military does not commit them, to prevent and punish direct and public incitement to genocide, to enable urgently needed basic services and humanitarian assistance, and to preserve evidence. It reaffirmed those measures and added more on 28 March 2024 and 24 May 2024. The Court ordered those measures because it found the rights at issue at risk, not because it had decided Israel is guilty. The merits are still to come.

What an Article 63 intervention is

Article 63 of the ICJ Statute says that whenever the construction of a convention is in question in a case, every other state party to that convention has a right to intervene. The Court's own press release puts the reason plainly: the Court's reading of the treaty "will be equally binding upon them".

The right is limited. Ireland's declaration itself acknowledges that an intervener is "limited to submitting observations on the construction of the convention in question", does not become a party to the proceedings, and may not deal with any other aspect of the case. So Ireland has not told the Court whether Israel committed genocide, and it cannot. It has offered a view on what the treaty's words mean.

Contrast this with the route Ireland took in the Court's separate advisory case, where it argued directly about the occupation. For that, see our explainer on the ICJ's 2024 advisory opinion. The two proceedings are different tools and easy to mix up.

How Ireland got there

On 6 February 2024 the Court's Registrar notified Ireland, as a party to the Convention, that its construction appeared to be in question in the case. Ireland had acceded to the Convention in 1976; the accession took effect on 20 September 1976, according to the declaration.

The Irish government announced in March 2024 that it intended to intervene, as TheJournal.ie reported. The Tánaiste said at the time that the step needed government approval, and that could take months. On 11 December 2024 the Tánaiste confirmed that the government had approved the intervention. Ireland filed on 6 January 2025.

• 29 December 2023: South Africa files its application.
• 6 February 2024: the Registrar notifies Ireland under Article 63(1).
• March 2024: the Irish government announces it intends to intervene.
• 11 December 2024: the Tánaiste confirms the government has approved it.
• 6 January 2025: Ireland files its declaration of intervention.

What Ireland told the Court

The declaration begins with a statement the Irish government clearly wanted on the record. It calls Hamas's 7 October 2023 attack "reprehensible", says Ireland condemns it unequivocally, and calls for the hostages' release. It also describes the prohibition of genocide as a peremptory norm of general international law, in which every state has a common interest.

Ireland says Articles I, II, III, IV, V and VI of the Convention are in question in the case. It then sets out how it reads Articles I, II and III. Three points stand out.

A state must not commit genocide, as well as prevent it

Article I says the parties "undertake to prevent and to punish" genocide. It does not say in so many words that a state must not commit it. Ireland argues the Convention has to be read as saying exactly that, and points out that the Court reached the same conclusion in its 2007 *Bosnia* judgment. On Ireland's reading, the Convention is both a criminal law instrument and a human rights instrument that obliges states not to commit genocide.

A state's intent and a person's intent can be proved differently

Article II defines genocide as certain acts committed "with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such". Ireland says that because a crime committed by an individual and a wrongful act committed by a state are different things, different approaches to proving intent are needed depending on which is being considered.

Intent can include knowing the foreseeable consequence

This is the point most likely to matter. Ireland submits that a person does not need to have the destruction of the group as their purpose. The mental element can be satisfied where someone acts deliberately, knowing or being in a position to know that the natural and probable consequence of their acts is to destroy, or contribute to destroying, the protected group, and goes ahead regardless. Ireland says it has read the word "intent" in Article II as covering knowledge of foreseeable consequences and not only purpose, and cites the drafting history of the Convention and Rwanda tribunal case law in support.

That is a legal argument about interpretation, offered to the Court for its consideration. It is not a finding about any party's conduct, and the Court is free to read the treaty differently.

Where the case stands now

Israel filed its Counter-Memorial on 12 March 2026, after the Court granted two extensions of the original July 2025 deadline. According to South Africa's Presidency, Israel's filing includes objections to the Court's jurisdiction and to the admissibility of the case. The written pleadings are confidential until the Court decides otherwise, so the arguments themselves are not public.

In an Order of 21 May 2026, the Court directed a second round of written pleadings. South Africa's Reply is due by 22 November 2027 and Israel's Rejoinder by 22 May 2029. The Court reserved the later procedure for further decision. The written phase will therefore not finish before May 2029, and oral hearings would follow.

Ireland is one of many interveners. South Africa's government told its Parliament that 22 states had filed interventions by the 12 March 2026 deadline. The ICJ's case page lists declarations from countries including Brazil, Belgium, the Netherlands, Iceland, Namibia, Hungary, Fiji and the United States. We found no order on that page deciding whether these declarations are admissible, so what the Court will do with them is still open.

What it changes, and what it does not

An intervention does not give Ireland a vote, a share of any remedy, or any power to enforce the provisional measures. It does put a state's reading of the treaty in front of the judges, and it signals where that state stands on the law before the merits are argued.

Ireland's stance has also drawn a diplomatic response. Announcing the closure of Israel's embassy in Dublin on 15 December 2024, Israel's foreign minister cited what he called Ireland's "extreme anti-Israel policies" (France 24). Taoiseach Simon Harris rejected that description. For the domestic side of Irish policy, see the explainer on the Occupied Territories Act.

For the court orders and key documents in one place, see our resources page, and the timeline for the sequence of events.