Slovenia says it will manage a "controlled flow" of migrants and refugees coming into the country.
Slovenian Prime Minister Miro Cerar made the statement while visiting a refugee registration center near the Croatian border on Saturday.
"It is our duty, according to agreements, to register people who arrived, check their identities and establish whether they can enter the European Union or not. If the situation grows too big and exceeds the capabilities of our policemen and other services, the volume of these checks might be reduced," said Cerar.
His comments come just days after Hungary closed its border with Serbia to stop the influx of migrants. The move sent more than 20,000 migrants into Croatia, which has already said it was no longer able to receive any more people.
On Saturday, 1,500 migrants entered Slovenia from Croatia, while hundreds were kept at the border areas as Slovenian police are only letting in limited numbers of people.
The Slovenian prime minister on Saturday also said the country did not want violence and would treat the migrants humanely. He added Slovenia will take in limited numbers of migrants, as the majority of them are heading to Western Europe.
Thousands more migrants are continuing to enter Macedonia, Croatia, Hungary and Austria. Hungary, which closed its border with Serbia, is allowing migrants in through the Croatian border.
Meanwhile, the high number of deaths from the perilous journey by boat from Turkey to the Greek islands has sent more migrants to the two countries' land borders.
However, Turkish authorities have thwarted their efforts.
On Sunday, at least 26 migrants were reportedly missing off the Greek coast after a boat sank. 20 others were rescued.
