The SNP is calling on the UK Government to reinstate the so-called Dubs scheme for unaccompanied child refugees as a matter of “humanitarian urgency”.
Stuart McDonald, the party’s immigration and asylum spokesman, also demanded efforts to address the migration crisis are given greater priority as MPs return to Westminster after the Easter break.
His intervention came after a fire at a camp in Dunkirk left hundreds of people homeless.
It emerged earlier this year that just 350 children will be brought into the UK under the programme, named after Labour peers Lord Dubs – far fewer than the 3,000 campaigners expected.
Theresa May defended the decision, but it provoked a storm of criticism, including from the daughter of Sir Nicholas Winton.
He was hailed “Britain’s Schindler” after saving hundreds of children from Nazi tyranny.
Mr McDonald said it was time for Mrs May to change her “shameful approach” and accept a “fair share” of unaccompanied child refugees.
He added: “Transferring children from Dunkirk is the first thing the UK Government should be doing in addressing the migration crisis and its consequences – this is a matter of humanitarian urgency.
“If we don’t offer a path to safety in the UK, then traffickers will undoubtedly be persuading children into thinking that they can instead.
“But there is so much more that the government should be doing further afield.
“Regardless of Brexit, it is appalling how little time has been devoted to debating the migration crisis and how we can address it.”
Home Secretary Amber Rudd told MPs in February that the UK Government had not closed the scheme, but done “what we were obliged to do”.
She added that the UK had “contributed significantly” to the hosting, supporting and protection of the most vulnerable children affected by the migration crisis.