Question: When did John Iii, Count Of Nassau-Saarbrücken's father die?

Anna Amalie of Baden-Durlach
Anna Amalia of Baden- Durlach( born: 9 July 1595; died: 18 November 1651 in Saarbrücken) was a Countess of Nassau- Saarbrücken by marriage to William Louis, Count of Nassau- Saarbrücken, and regent of Nassau- Saarbrücken during the minority of her son from 1640.
Crato, Count of Nassau-Saarbrücken
Crato, Count of Nassau- Saarbrücken( 7 April 1621 – 25 July 1642, Straelen), was the oldest son of Count William Louis of Nassau- Saarbrücken and his wife, Landgravine Anna Amalia of Baden- Durlach.
He succeeded his father as Count of Nassau- Saarbrücken in 1640.
However, as he was still a minor at the time, he stood under the regency of his mother.
Crato was killed in battle at Straelen in 1642.
He was succeeded by his younger brother John Louis.
Charles William, Prince of Nassau-Usingen
Charles William( 9 November 1735 – 17 May 1803) was Prince of Nassau- Usingen from 1775 until his death.
From 1797 until his death, he was also titular Prince of Nassau- Saarbrücken, however, Nassau- Saarbrücken was occupied by France during that period.
He was born in Usingen, the eldest son of Prince Charles of Nassau- Usingen and his wife, Christina Wilhelmina, the daughter of Duke John William III of Saxe- Eisenach.
In 1770, Charles William became Lieutenant- General in the Dutch army.
In 1789, he was promoted to general and in 1790 to colonel of the Walloon regiment and captain of the grenadiers.
In 1775, he succeeded his father as Prince of Nassau- Usingen.
In 1783, he concluded a treaty of inheritance with the princes of Nassau- Saarbrücken, Nassau- Weilburg and Nassau- Dietz( i.e., Orange- Nassau), in which it was agreed that the Nassau lands were indivisible and that mutual succession among the various branches based on primogeniture would be observed.
In 1797, Prince Henry Louis of Nassau- Saarbrücken died childless and Charles William inherited his principality.
However, under the Treaty of Lunéville, the territories on the left bank of the Rhine were lost to France.
The Reichsdeputationshauptschluss of 1803 compensated Charles William with territories taken from the Electorate of Mainz, the Electorate of Cologne, Electorate of the Palatinate and Hesse.
Charles William died later that year.
Since he had no male heir, he was succeeded by his younger brother Frederick Augustus.
Elisabeth of Nassau-Dillenburg, Countess of Wied
Elisabeth of Nassau-Dillenburg (1 December 1488 – 3 June 1559 in Dillenburg) was a member of the House of Nassau.
She was a daughter of John V of Nassau-Dillenburg and his wife Elisabeth of Hesse-Marburg.
Her brothers were Henry III of Nassau-Breda, John of Nassau-Vianden-Dietz, Ernest of Nassau and William the Rich.
Her sister was Maria of Nassau.
John Louis, Count of Nassau-Saarbrücken
Count John Louis of Nassau-Saarbrücken (19 October 1472, in Saarbrücken – 4 June 1545, in ibid.) was the posthumous son of Count John II and his second wife, Elisabeth of Württemberg-Urach.
In 1492, he married Elisabeth (1469–1500), the daughter of Count Palatine Louis I of Zweibrücken.
They had the following children:
After Elisabeth's death, John remarried in 1506 to Catherine of Moers-Saarwerden (1491–1547).
They had the following children:
William Henry, Prince of Nassau-Saarbrücken
William Henry, Prince of Nassau- Saarbrücken( 6 March 1718 – 24 July 1768), was Prince of Nassau- Saarbrücken from 1741 until his death.
John III, Count of Nassau-Weilburg
John III of Nassau- Weilburg( 27 June 1441 – 15 July 1480) was count of Nassau- Weilburg as co-regent with his father.
He came from the Walramian branch of the House of Nassau.
John III, Count of Nassau-Saarbrücken
John III, Count of Nassau-Saarbrücken (5 April 1511 – 23 November 1574) was a son of Count John Louis of Nassau-Saarbrücken and his second wife Catherine of Moers.
He succeeded his childless brother Philip II in 1554 as Count of Nassau-Saarbrücken.
He married Adelaide of Kronenkracht and Elisabeth Selz.
However, his children predeceased him.
When he died in 1574, Nassau-Saarbrücken fell to Nassau-Weilburg.
Philip IV, Count of Nassau-Weilburg
Philip IV of Nassau- Weilburg, also known as Philip III of Nassau- Saarbrücken( 14 October 1542 in Weilburg – 12 March 1602 in Saarbrücken) was Count of Nassau- Weilburg from 1559 until his death and since 1574 also Count of Nassau- Saarbrücken.
Both possessions belonged to the Walram line of the House of Nassau.
In Weilburg, he was the fourth count named Philip, but only the third in Saarbrücken, because his father, Philip III of Nassau- Weilburg never held Nassau- Saarbrücken.
Louis, Prince of Nassau-Saarbrücken
Louis, Prince of Nassau- Saarbrücken( 3 January 1745 in Saarbrücken – 2 March 1794 in Aschaffenburg) was the last ruling prince of Nassau- Saarbrücken.
He ruled from 1768 until the French Revolution.

Answer: 4 June 1545