"Can a Member of the house of representatives get elected again after their 3 year term?"

Yes, a member of the House of Representatives or a senator can be elected many times as long as their election is valid and they meet all the criteria for being a member of parliament (see section 44 of the Australian Constitution. There is no limit on the number of terms a member of parliament can serve.

The longest serving member of the Australian Parliament was Billy Hughes. He was a member of the House of Representatives from 1901 to 1952—a total of 51 years and 7 months.

diagram to help explain Can a Member of the house of representatives get elected again after their 3 year term?