From the New York Times:

With their bill to repeal and replace the Affordable Care Act in tatters, Senate leaders on Tuesday pushed to vote on a different measure that would repeal major parts of President Barack Obama’s health law without a replacement — but that plan appeared also to collapse.

Senators Susan Collins of Maine, Shelley Moore Capito of West Virginia and Lisa Murkowski of Alaska, all Republicans, immediately declared they could not vote to repeal the Affordable Care Act without a replacement — enough to doom the effort before it could get any momentum.
Consequently, the repeal-and-replace-later bill would appear to be dead.

Here is Capito's tweet on the matter:

My latest statement on the Senate health care bill & planned vote to repeal Obamacare: pic.twitter.com/yAVIxgptCu

— Shelley Moore Capito (@SenCapito) July 18, 2017

Thanks, Shelley.