New Living Translation
In fact, unless the Lord shortens that time of calamity, not a single person will survive. But for the sake of his chosen ones he has shortened those days.

American Standard Version
And except the Lord had shortened the days, no flesh would have been saved; but for the elect's sake, whom he chose, he shortened the days.

Berean Study Bible
If the Lord had not cut short those days, nobody would be saved. But for the sake of the elect, whom He has chosen, He has cut them short.

Douay-Rheims Bible
And unless the Lord had shortened the days, no flesh should be saved: but for the sake of the elect which he hath chosen, he hath shortened the days.

English Revised Version
And except the Lord had shortened the days, no flesh would have been saved: but for the elect's sake, whom he chose, he shortened the days.

King James Bible
And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days.

World English Bible
Unless the Lord had shortened the days, no flesh would have been saved; but for the sake of the chosen ones, whom he picked out, he shortened the days.

Young's Literal Translation
and if the Lord did not shorten the days, no flesh had been saved; but because of the chosen, whom He did choose to Himself, He did shorten the days.

Mark 13:20 Additional Translations ...