In a victory for the Republican National Committee, the Georgia Supreme Court ruled Monday that thousands of voters whose mail-in ballots were cast late will have no additional time to return them.

The court's ruling overturned a lower judge's ruling that had granted 3,000 voters an extension to the mail-in voting deadline after Cobb County election officials admitted they missed the deadline to mail out their ballots.

The deadline for mail-in ballots to be received in Georgia is Election Day — but the lower judge had granted those voters an extension to allow them to be postmarked by Election Day and received by Nov. 8, the same deadline as foreign ballots.

The RNC had appealed the ruling, saying it was a violation of election law and that voters had other ways to cast their ballot, including in person.

The Georgia Supreme Court ordered the Cobb Board to “separately store in a secure and sealed container” those voters' mail-in ballots received after the Election Day deadline but before Nov. 8, separate from other ballots cast.

Cobb County had previously been ordered to send all late ballots by Nov. 1 via express mail and overnight return envelopes.

The court also ordered the board to notify voters of the change via email, text message or public announcement.