The usual suspects….
No.
One of the thirds was shown as cast out in Chapter 6 (Rev.)
The other in Chapter 12.
Zechariah 13 foretold it:
8 And it shall come to pass in all the land,” Says the Lord, “That two-thirds in it shall be cut off and die, But one-third shall be left in it:
9 I will bring the one-third through the fire, Will refine them as silver is refined, And test them as gold is tested. They will call on My name, And I will answer them. I will say, ‘This is My people’; And each one will say, ‘The Lord is my God.’ ”