The US and Canada have reached a deal to reject asylum seekers at unofficial border crossings, officials say.
Large numbers of migrants have been making unsanctioned crossings on Roxham Road at the US-Canada border.
The move closes a loophole created by a 2004 asylum agreement with the US on where migrants have to make their asylum claims.
It allowed Canada to turn migrants away at official points of entry but not at unofficial crossing points.
As a part of the deal, Canada will now also create a new refugee programme for 15,000 migrants fleeing persecution and violence in South and Central America, unnamed US officials told CBS News, the BBC's US partner.
Mr Biden is in Ottawa, Canada, for 24 hours to talk about a series of economic, trade and immigration issues with Mr Trudeau.
The migration accord is scheduled to be announced before he returns to the US on Friday.