Shirin was held for four hours at the Israeli terminal on her return from Jordan for an Eid visit earlier Thursday, her husband said.
He later received a call from Israeli officials telling him to pick up his young daughter from the checkpoint, as his wife had been detained.
Thaer, 33, held a 77-day strike to protest his detention without charge by Israel earlier this year. He was released in June to his home town of Kharas, near Hebron, after a deal with Israeli authorities that he be freed at the end of his administrative detention term.
In Nablus, Nour Abu Khamis Al-Zamel was detained at the Shavi Shomron checkpoint on Thursday evening, a Ma’an reporter said.
Al-Zamel’s son is currently jailed in Israel.
An Israeli military spokesman said he was looking into the incidents.