ALL ISRAEL SAVED? WAS THE ONE-THIRD​ REMNANT ALREADY SIFTED?

ROMANS SAYS "ALL ISRAEL WILL BE SAVED." SO WHEN DID THE SETTING APART OF THE 1/3 OCCUR?

Thanks to the first Yah and the Ruach and the word, and the following ministries for confirmation in parts of their teachings although we don't necessarily agree upon all things:
Kingdom Preppers
Hebrew Nation Building
TEOTW Minsitries