Many attended American schools from the time they were in kindergarten.
The decision comes as a reversal of one of President Donald Trump's campaign promises to deport the immigrants protected by this program.
The program does not give them residency status, but temporarily protects them from deportation and allows them to work legally.
Kelly, an appointee of President Trump, rescinded the 2014 order on the five-year anniversary of the implementation of the DACA program. By keeping open the possibility of ending DACA, though, he preserves his bargaining power - i.e., his ability, perhaps, to get something from Democrats in exchange for a final decision to retain DACA. Trump laid the groundwork to ramp up his deportation force early in his presidency, leading to many immigration raids resulted in large numbers of deportations, many of nonviolent offenders.
A federal appeals court blocked the program, and the US Supreme Court let that ruling stand in a 4-4 split decision previous year. Republicans saw it as a "backdoor amnesty" and argued that Obama overstepped his authority by protecting a specific class of immigrants living in the United States illegally.
About a year ago, the Supreme Court deadlocked, 4-4 on a challenge to the Texas ruling. However, the program never was fully implemented. The DAPA program could have afforded protection to about 3.6 million undocumented immigrants, according to the Migration Policy Institute. Both programs required that participants meet certain conditions, including not having a criminal history.
BBC pulls documentary featuring Grenfell Tower victim
He told Sky on the day of the fire: "We are praying that Khadija is in a hospital or a centre and is unable to contact us". Mariem Elgwahry , 27, lived on the 19th floor of Grenfell Tower, where she is reported to have lived with mother Suhar.
But since winning the election, Trump has taken a softer stance on DACA.
In February, an undocumented immigrant was deported to Mexico by US border officials in what was reportedly the first instance of a DACA recipient being forced out of the USA under President Trump.
This mirrors the administration's shift to harsher immigration raids that have separated parents from their children, prompting some city officials to declare themselves "sanctuary cities" for undocumented people in opposition to Trump's draconian immigration policies.
The White House spokesman said the statement was only meant to clarify that the rescission of the program for parents would have no impact on the program for immigrants who arrived as children.
Since assuming office, President Trump has expressed dismay for the beneficiaries of the program, describing them as day dreamers, who could not remember living anywhere else except the United States.
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