Out-of-form New Zealand opener Devon Conway will miss the third Test against England in Hamilton to remain at home for the birth of his first child this week, the team said on Monday.

Conway, who scored just 21 runs over four innings as the Black Caps suffered heavy losses in the first two Tests, will be replaced in the squad by uncapped all-rounder Mark Chapman.

"Family comes first in this environment and we're all really excited for Dev and his wife Kim to welcome their first child," said coach Gary Stead.

"Mark was with the test squad in India recently and returned to the Plunket Shield by scoring an impressive 276 - so it's a good time for him to be joining us."

The absence of Conway might also give the ultra-loyal Stead the opportunity to bring Will Young into the batting line-up for the final test of the series, which starts at Seddon Park on Saturday.