The authorities say the sentenced Islamists were accused of aiding and abetting Al-Islah (reform) group, which is considered to be the local branch of the Muslim Brotherhood.
A UAE court on Monday jailed a Qatari and two Emiratis up to seven years for raising funds in support of a Muslim Brotherhood-linked group.
Dozens of Islamists have been jailed in recent months in the United Arab Emirates as concern grows over the Muslim Brotherhood following the group's prominent role in Arab Spring uprisings.
The Federal Supreme Court in Abu Dhabi sentenced Mahmud al-Jidah, a Qatari, to seven years in prison followed by deportation, the online edition of the Emirate Gulf News reported.
Abdul Wahid al-Badi and Saeed al-Buraimi, both Emiratis, were handed a five-year jail sentence each.A third Emirati, Taher al-Tamimi, was acquitted, the English-language daily added.
It said the three were accused of "aiding and abetting Al-Islah (reform)" group, identified by authorities as the local branch of the Muslim Brotherhood, and "collecting funds to support it".
On January 21, the same court, whose rulings are final, jailed a group of 10 Emiratis and 20 Egyptians to terms ranging from three months to five years for forming a Muslim Brotherhood cell.
The 10 UAE citizens were among 69 nationals jailed in July last year for up to 15 years on charges of plotting to overthrow the government. Prosecutors said the accused were linked to Al-Islah.
UN expert Gabriela Knaul last month criticised "violations" and a "lack of transparency" in court proceedings in the UAE and urged an independent probe into allegations of torture in prisons.
Amnesty International said the trials were "littered with irregularities", and many of the Islamist defendants told the court they had been tortured or ill-treated. The authorities categorically deny using torture. The UAE has not seen any of the widespread protests that have swept other Arab states since 2011.
