Donald J. Trump contributed another $10 million to his presidential campaign on Friday, providing a needed financial boost to his bid at a critical juncture.

Mr. Trump’s donation was revealed in disclosures filed late Friday night with the Federal Election Commission. He had pledged to make the donation in an interview aired earlier in the evening with the Fox New host Bret Baier.

The donation came after earlier disclosures, filed on Thursday, revealed that Mr. Trump had not contributed any cash to his campaign in October despite claims that he would be spending heavily and despite earlier pledges to match the small contributions of his grass-roots supporters. That earlier disclosure covered only the first three weeks of October; Mr. Trump typically wires money to his campaign toward the end of the month.