IRNA � If US President Donald Trump eschews certifying Iran's compliance with the nuclear deal, the relations with North Korea will 'further erode' and mistrust will emerge, said Former US Department of State diplomat on Sunday.

Speaking at the New Yorker Festival, Sherman said if Trump decides not to certify the deal and 'kick it over to Congress,' the measure could have a negative impact, wrote the United Press International.

Beginning in 1999, the New Yorker Festival is an annual event usually held in early October by The New Yorker magazine. The event brings together big names in arts, politics and some other fields.

'Decertification will have an effect on the trust deficit,' Sherman said.

'There are eight reports Iran has complied with the deal, and it's a multilateral agreement,' she added.

She added if the US doesn�t certify Iran's compliance 'Why, then, would North Korea talk with us?'

She had last week said that seeing the Iran deal decertified, North Koreans will infer that the US is not trustable.