According to her, this is due to the way the Iranians approached the last round of negotiations.
"The President instructed the team dealing with national security issues to be ready in case diplomacy fails and to consider other options for action," Psaki TASS quotes.
She noted that Washington is holding consultations on this topic with a number of partners around the world.
The US State Department previously suggested that a new round of talks in Vienna on the Joint Comprehensive Plan of Action (JCPOA) on the Iranian nuclear program could begin before the end of 2021.
At the same time, Washington is ready to completely lift sanctions from Tehran, which run counter to the US obligations under the JCPOA, if Iran also abides by its obligations.