Mr Pompeo was responding to questions from Congressman Dana Rohrabacher who said the US should stop providing any financial assistance to Pakistan until it releases Shakil Afridi, a doctor who helped the CIA hunt down Osama bin Laden in 2011.
"With respect to Pakistan, we released far fewer funds in 2018 than in the year prior. The remainder of the funds available are under review. My guess is that that number will be smaller still," he told members of the House Foreign Affairs Committee.
Mr Rohrabacher said he sees no "reason" in giving any financial aid to Pakistan if it still keeps Shakil Afridi in jail. Pompeo said he worked "diligently" on the issue of Afridi in his previous role as the CIA Director, but acknowledged that he has been "unsuccessful" so far.
"Please be aware that it's at my heart and I know it's important and we can do that. We can achieve that outcome," he said.
"Our State Department officials are being treated badly as well. Folks working in the embassies and in the consulates and other places are not being treated well by the Pakistani government either, a real problem that we need to take the measure of also," he said.
Congressman Brad Sharman hoped that the US State Department would reach out to the leaders of Pakistan about the "forced disappearances in Sind".