He, however, asserted that sidelined leader TTV Dhinakaran and his aides would not be admitted into the party.
"Only the party has to take a decision on that. But in no case, Dhinakaran or his aides will be accepted," Mr Jayakumar told reporters here.
He was replying to a question whether the 18 disqualified lawmakers loyal to Mr Dhinkaran would be accepted into the party.
There have been reports in a section of local media claiming that some of the supporters of Mr Dhinakaran, who has recently formed his own party AMMK, were keen to come back to the AIADMK.
The high court yesterday gave the split verdict with Chief Justice Indira Banerjee upholding the Assembly Speaker's order disqualifying the 18 lawmakers loyal to Mr Dhinakaran and Justice M Sundar setting it aside.
In view of the differing judgements, a third will now hear the matter afresh.
"One, the speaker did not have vested interest, he has powers to do what he has done, and his decision should not be subjected to review," he said.
"Whatever it is, betrayals have never won in history, they have always lost," he added.
The legislators were disqualified in September last year after they met the state Governor and expressed lack of confidence in Chief Minister K Palaniswami.
On Mr Dhinakaran's remarks that the verdict was an "extension to anti-people government", Mr Jayakumar said, "First they have to understand the way the government was formed. It is (due to) the hardwork of "Amma" (late Chief Minister J Jayalalithaa)."
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections. Election results will be out on May 23.