Yep, essentially. The Administration can still appeal it in the 9th Circuit.
Trump v. East Bay Sanctuary Covenant
ScotusBlog
http://www.scotusblog.com/2018/12/justices-rebuff-government-on-asylum-ban/#more-278070
Justices rebuff government on asylum ban
Last week the federal government went to the Supreme Court, asking the justices to block a ruling by a federal judge that bars the Trump administration from denying asylum to immigrants who enter the United States illegally from Mexico. Today the justices turned down the government’s request, which means that the government will not be able to enforce its new policy on asylum while the government appeals to the U.S. Court of Appeals for the 9th Circuit and, if it comes to that, the Supreme Court. Chief Justice John Roberts provided the deciding vote, as four justices – Justices Clarence Thomas, Samuel Alito, Neil Gorsuch and Brett Kavanaugh – indicated that they would have granted the government’s application.
The dispute has its roots in the Trump administration’s announcement, in early November, of a new policy on asylum. Under the old rules, an immigrant in the United States could seek asylum – that is, the right to stay in the United States because she believed she would be persecuted if she returned to her own country – no matter how she came to the United States. But under the new policy, immigrants who cross into the United States illegally from Mexico would be ineligible for asylum.
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