A woman who admitted killing three of her seven children and trying to kill a fourth by driving her car into a Melbourne lake is likely to be deported after serving jail time, a judge has said.

Akon Guode, 37, listened carefully to an Arabic interpreter and showed little emotion in the Victorian Supreme Court on Friday as Justice Lex Lasry said returning her to her home country of South Sudan was "almost a certainty".

Guode pleaded guilty last month to the infanticide of her one-year-old son Bol, the murders of her four-year-old twins Hanger and Madit and the attempted to murder of her six-year- old daughter Aluel on the same day in April 2015.

Guode came to Australia as a refugee in 2006 with her three oldest children from war-torn Sudan where her first husband died.

Sixteen-month-old Bol and four-year-old twins Madit and Hanger all died in a lake in Wyndham Vale.

AAP