Eduardo Bolsonaro called the conviction "baseless and senseless".
The US and Brazilian presidents did not appear together publicly, but traded compliments after their talks.
The two leaders have a strained relationship and will be closely watched for signs of a breakthrough over tariffs and other issues.
Last year ex-president Jair Bolsonaro was sentenced to 27 years in jail for plotting a coup after losing an election.
Former President Jair Bolsonaro was moved from his cell to hospital earlier this month with pneumonia.
Rio de Janeiro's iconic Carnival parades began with a tribute to Brazil's President Lula, illustrating his rise from poverty to power.
The former leader is serving a 27-year sentence for plotting a coup after losing the 2022 presidential election.
Former president is granted permission to leave jail for a hernia operation on Christmas Day.
If passed, the bill would see the ex-president and others receive shorter sentences for coup-related crimes.
