Angela Merkel has insisted she is "very well" after she was seen shaking at a public occasion for the third time in recent weeks on Wednesday.
The veteran Chancellor can be seen shaking at a ceremony to welcome the Finnish prime minister to
Berlin in a short video clip circulating on social media.
After shaking for a few seconds she gestures to Finnish leader Antti Rinne and then walks away without showing any signs of distress.
Reuters has also reported that Mrs Merkel started to shake during the meeting in Berlin.
Speaking to journalists afterwards, Mrs Merkel said: "I feel very well, there is no need to worry."
She added: "I think me saying I am fine should be acceptable."
Mrs Merkel has carried on with her scheduled appointments since the incident, and no official explanation has been offered.
The German leader’s first shaking fit came on June 18 when she welcomed the Ukrainian president to Berlin. She put that down suffering dehydration during a heatwave.
A week later she suffered a similar bout of trembling during a ceremony at the German presidential residence at Berlin’s Tiergarten park.
Asked after that event if she had visited the doctor, Mrs Merkel said "I can tell you this much, I can understand your question. But there is nothing special to report, I'm fine. I am convinced - just as the reaction has occurred, it will also pass away again."