Hillary Clinton has now twice snubbed a process server attempting to deliver the defamation lawsuit filed against her by Democratic presidential candidate Tulsi Gabbard, according to Gabbard’s attorney.

“I find it rather unbelievable that Hillary Clinton is so intimidated by Tulsi Gabbard that she won’t accept service of process,” the congresswoman’s attorney, Brian Dunne, told The Post. “But I guess here we are.”

Dunne said their process server first attempted to effect service at Clinton’s house in Chappaqua on Tuesday afternoon — but was turned away by Secret Service agents.

The agents directed the server to Clinton’s lawyer, David Kendall, who on Wednesday claimed at his Washington, DC, firm, Williams & Connolly, that he was unable to accept service on Clinton’s behalf, said Dunne.

Gabbard sued the former secretary of state for $50 million last week for calling her a “Russian asset.” Clinton has refused to retract the statement.

Dunne said his team was weighing next steps.

Reps for Clinton did not immediately return a request for comment.