The appeals court upheld the April verdict, his lawyer Hojjat Kermani told the Associated Press news agency on Saturday. Iranian state media did not immediately recognize the ruling after a closed-door hearing.
The 43-year-old British Iranian was convicted of spreading “anti-establishment propaganda” when she took part in a protest outside the Iranian embassy in London in 2009.
The court also upheld a one-year foreign travel ban, meaning she cannot leave Iran to join her husband and six-year-old daughter for nearly two years.
Kermani said his client was “concerned” about the appeal court’s decision.
Zaghari-Ratcliffe was arrested at Tehran airport in April 2016 on her way home to Britain after visiting family and sentenced to five years in prison for plotting to overthrow the government Iranian.
His previous sentence ended in March 2021, raising hopes of his return to the UK. Instead, she was immediately sent back to court to face new charges.
Since the start of the coronavirus pandemic, she has been temporarily released, travel being limited to her parents’ home in Tehran.
Zaghari-Ratcliffe was working for the Thomson Reuters Foundation at the time of his arrest. His family and the charity, an affiliate of the Reuters news agency, denied the charges.
Rights groups have accused Tehran of using dual citizenship as a bargaining chip for money and influence in negotiations with the West.
Iran, which does not recognize dual nationality, has denied the charges.