Jared Kushner, Trump's son-in-law and special envoy for peace, and US envoy Steve Witkoff are travelling to Dublin from Moscow, where they are due to hold talks with Russian President Vladimir Putin.
The planned meeting with Zelenskyy follows two days of US-brokered negotiations between Ukraine and Russia in Abu Dhabi.
Speaking after the talks, Kushner said the Dublin meeting would involve a 'debrief' with the Ukrainian president, adding that they hoped to 'further explore some of the ideas' discussed during negotiations.
The meeting is separate from the European Political Community (EPC) summit, which takes place at the Convention Centre Dublin on Friday.
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However, it is understood that the talks could take place at the venue for security reasons.
Around 50 European leaders, including Zelenskyy, are attending the summit, which brings together representatives from EU and non-EU countries.
Taoiseach Micheál Martin met Zelenskyy at Government Buildings on Wednesday evening ahead of the event.
The war in Ukraine is expected to feature prominently in discussions, alongside European security, hybrid attacks, economic security and democratic resilience.
The summit has prompted an unprecedented security operation across Dublin, with extensive road, air and maritime restrictions in place.
