The game at Llandovery's Church Bank ground will be one of only three all-Premiership clashes. The others see Cross Keys host Bedwas and Carmarthen Quins entertain Pontypool.
The reward for their battling performances to date in the tournament for the last surviving Welsh Districts club, Bryncethin Sports, is a home tie against ASDA League Division One side Caerphilly.
Bryncethin accounted for Bala in round one, 28-8, and Seven Sisters, 21-17, away from home in round two. Now they have an even bigger scalp in mind in December.
Newly promoted Premiership side Glamorgan Wanderers will host Division One's Ystrad Rhondda in one of the closest games to call, while Aberavon will also have home advantage over a Division One team, Fleur de Lys.
Last season's beaten finalists, Pontypridd, will travel to Division Two West side Pontyberem, while Swansea won't be relishing their trip to high flying Corus of the same division.
The 2004 champions, Neath, will ensure a bumper crowd at Taffs Well, the unbeaten leaders of Division Four South-East, and Ebbw Vale will also have to travel to Division Four South-West club Heol y Cyw.
The sole surviving north Wales club, Nant Conwy, will be fancying their chances of making it three home wins in a row after being drawn against Division Three South-East's Tylorstown. They have already seen off Maesteg Quins, 32-0, and Hirwaun, 48-8, on their own patch and will be seeking to ride into round four with another convincing win.
Cardiff face a tricky trip west to Laugharne, while Premiership Maesteg's home clash with Kenfig Hill will give the Division Three South-West side the chance to cause an upset.
Bridgend host Division One side Cwmllynfell and Newport host Beddau.
KONICA MINOLTA CUP THIRD ROUND DRAW (matches to be played on the weekend of 3 December)
Aberavon v Fleur de Lys
Abercynon v Machen
Blackwood v Rhydyfelin
Bridgend v Cwmllynfell
Bryncethin Sports v Caerphilly
Brynithel v Pencoed
Cardiff HSOB v Kidwelly
Carmarthen Quins v Pontypool
Corus v Swansea
Cross Keys v Bedwas
Glamorgan Wanderers v Ystrad Rhondda
Heol y Cyw v Ebbw Vale
Laugharne v Cardiff
Llandovery v Llanelli
Maesteg v Kenfig Hill
Merthyr v Cilfynydd
Mumbles v Llangennech
Nant Conwy v Tylorstown
Narberth v Barry
Newport v Beddau
New Tredegar v Newport Saracens
Penallta v Bonymaen
Penclawdd v Glycorrwg
Pontyberem v Pontypridd
Pontypool United v Llanharan
Taffs Well v Neath
Taibach v Dunvant
Tonmawr v Mountain Ash
Tonna v Pill Harriers
Trebanos v Builth Wells
UWIC v Llantwit Fardre
Whitland v Bridgend Athletic
Wales reached their first semi-final since 2013 in the opening round of this season's HSBC World Rugby Sevens Series in Dubai. WRU TV's Graeme Gillespie recaps on what proved to be an eventful tournament
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series