St. Andrews University is one of a number of universities in Ireland that have had to make changes to admissions policies in the wake of a series of suicides.
In March, it announced that students from the UK and the US were not eligible for its Irish admissions scheme, and that students could apply for admission only from the European Union.
The policy was widely criticised, with many saying it was discriminatory.
St Andrews has now announced it will not accept US and UK applicants.
“We’re disappointed to hear of the recent suicides at St Andrews University, and we’re working closely with St Andrews to ensure a smooth transition to the new admissions scheme for students from both the UK & US,” the university said in a statement.
“Students from these countries will no longer be able to apply for a visa under our current admissions regime.”
The policy will be phased in to allow students from these two countries to continue to apply, but there will be a transition period where students from St Andrews will only be able apply to St Andrews if they have a visa.
“As part of this process, we have agreed with the UK government to review its student visa scheme.”
In May, the British government also announced it was not offering a visa to US and Canadian students who were studying at St Andrew.
The US Department of Education said it was investigating the issue.
A spokesperson for the Department of Foreign Affairs and Trade said: “As part to its commitment to ensure that we protect and advance our citizens’ interests and freedoms, the Department is reviewing our policy for international students and ensuring they can be included in the scheme.”