The meeting at Number 10 was held to determine whether Britain would join US-led air strikes against the regime of president Bashar Assad.
The Labour leader told the BBC'sAndrew Marr Show he believed Parliament should have been given a vote on military intervention and that the prime minister had been too keen to "follow Donald Trump's lead".
But Mr Corbyn called for the introduction of a War Powers Act to stop governments launching military action in most circumstances without the backing of MPs.
Asked by CNN on Sunday why parliament wasn't asked for its approval for Syria attacks, British Foreign Minister Boris Johnson says our main concern was the effectiveness and speed of the operation in Syria.
In theory there are three alternative responses - the first a punitive strike such as the USA attack on the Shayrat air base in April 2017 that saw 59 Tomahawk cruise missiles hit the the air base in response to a chemical weapons attack.
The UK government is "waiting for instructions" from Donald Trump about whether to launch a missile strike on Syria, Jeremy Corbyn has said.
Corbyn, who has previously opposed military action in Syria, among other war zones, said he "can only countenance involvement in Syria if there is United Nations authority behind it".
Labour's shadow home secretary Diane Abbott told BBC Radio 4's Today programme: "It would be outrageous for the government not to bring military action in Syria to Parliament - for Parliament to have a vote..."
"The overwhelming goal of this mission was to send a message", the foreign secretary said.
"Corbyn seems more anxious about upsetting Russian Federation than about preventing use of chemical weapons".
The prime minister's office said she had spoken to Mohammed bin Salman, the crown prince of Saudi Arabia; Turkish President Tayyip Erdogan; German Chancellor Angela Merkel and the prime ministers of Italy, Australia and Canada about the strikes. The attack killed "up to 75 people", according to the government.
The government said it is "highly likely" that Assad is responsible for the Douma attack, with ministers agreeing "it was vital that the use of chemical weapons did not go unchallenged".
He said it was "deeply alarming" to see the return of chemical weapons to the battlefield in Syria and the airstrikes was the "right thing to do" in "settling the determination to ensure these weapons cannot be used".
Earlier on Friday, Corbyn also accused May's government of "waiting for instructions" from the United States on how to proceed in the Syrian crisis, but that Donald Trump was giving "alarmingly contradictory signals".
Corbyn, the British opposition leader who unexpectedly became party head in 2015, is a supporter of Palestinian rights and a critic of Israel.
His comments come after the United States, United Kingdom and France fired early Saturday over 100 missiles into Syria according to the Syrian government, Russian Federation and the US military.
The scheme would involve the next Labour government providing funds to local authorities who introduce bus franchising, or who take their local bus services back under public control.
"In a modern, parliamentary democracy, I think you have got to have parliamentary approval if you have a planned, policy decision to launch a military attack of any significant size".
But it is understood Harry and Meghan will see the couple soon, possibly during an official overseas trip once they are married. He is a renowned portrait and fashion photographer, who has also published two photography books.
Vettel expects Mercedes to be closer in the race but admits Ferrari was braced for a tougher challenge on Saturday. Ferrari's Kimi Raikkonen was second-fastest, ahead of Hamilton's Mercedes teammate Valtteri Bottas .
Authorities say they've identified the six people killed in the fiery crash of a small plane on a golf course in a Phoenix suburb. Pro-Russian rebels are widely accused of shooting the plane down using a surface-to-air missile but they deny responsibility.
The reality star's younger sister Kylie Jenner is the first sister to offer her congratulations on social media. Kylie Jenner is fully embracing mommy life - and she's determined to look hot while doing it!
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Capps said during a Wednesday press conference he wouldn't comment on the cause or manner of the child's death in North Carolina. The child's grandmother, Steven Pladl's mother, had become concerned after he collected Bennett from her so alerted the police.
The 31-metre drop killed the women, both 39, and their children Markis Hart , 19; Jeremiah Hart , 14; and Abigail Hart , 14. A body identified as African-American and female was found floating near the crash site on April 7.
On the Chemical Attack in Douma
The ministry said the allegations have been planned beforehand to prolong the lives of the "terrorists" in Douma. France said it would work closely with the United States on a response to the suspected chemical attack .
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