Sri Lanka struggle before rain intervenes

New Zealand captain Brendon McCullum set the stage for a tantalising conclusion at Dunedin's University Oval with a sporting declaration that offered Sri Lanka more than five sessions to reach a 405-run target.

But the tourists' response was disrupted by three stoppages as southerly squalls swept across the ground.

Further showers are forecast for the final day.

At stumps on day four, with an hour's play lost because of the weather, Sri Lanka were 109 for three, requiring a further 296 runs to pull off an epic victory.

Dinesh Chandimal is not out 31 and captain Angelo Mathews has yet to face.

Sri Lanka's highest fourth-innings chase is 352-9 against South Africa in 2006 and the highest by any side in New Zealand is 348-5 by the West Indies in 1969.

McCullum declared New Zealand's second innings at 267-3 to go with their 137-run first innings advantage.

Sri Lankan openers Dimuth Karunaratne and Kusal Mendis set about building a foundation reaching 54 in the 27th over when New Zealand struck twice.

Southee had Karunaratne, Sri Lanka's top scorer in the first innings, caught behind for 29 and 10 runs later debutant Udara Jayasundera fell to Neil Wagner for 3.

Mendis, in only his second Test, persevered for 150 deliveries and benefited from dropped catches on 13 and 25 before he was caught behind off Southee for 46 with the score on 109.

Before his replacement Mathews could reach the crease a hail storm brought play to a halt for the third and final time.

The dismissal of Mendis gave wicketkeeper BJ Watling a New Zealand record ninth catch for the Test.

With seven wickets left he has a chance to reach the world record of 11 jointly held by England's Jack Russell and South African AB de Villiers.