With her concert career not particularly profitable, Parlow looked for other career options.
 In 1929, she was appointed to the faculty of Mills College in Oakland, California.
 She received an honorary Master of Arts degree from Mills College in 1933.
 While at Mills College she began to play in string quartets, in which she played violin, and in 1935 she formed the South Mountain Parlow Quartet.

In 1936, Parlow accepted a position at the Juilliard School of Music.
 She remained there until World War II, when she returned to Canada and gave a series of lecture-recitals at the Royal Conservatory of Music in Toronto.
 She wrote to Sir Ernest MacMillan about a permanent position with the Royal Conservatory of Music, and obtained one in 1941.
 While there, she was a teacher for the singer Gisèle LaFleche, violinist Ivan Romanoff, and the conductor Victor Feldbrill.

She became a regular performer with the Toronto Symphony Orchestra as well, bringing additional income.
 In Toronto, she organised the Canadian Trio, which she performed in with Zara Nelsova playing the cello, and Sir Ernest MacMillan playing piano.
 The trio debuted with a performance of Schubert's Trio in B-flat Major, and Haydn's Trio in A Major and Tchaikovsky's Trio in A minor.
 They received excellent reviews and the trio continued performing across southern Ontario, as well as on radio, until 1944.

The Canadian Trio was earning as much as $750 per performance.
 Inspired by this success, Parlow started her third string quartet in 1942, called the Parlow String Quartet.
 The quartet also included Isaac Mamott on cello, Samuel Hersenhoren as second violin and violist John Dembeck.
 Parlow did all the administrative work for the quartet.
 The quartet gave concerts in Canada, both live and on radio, but did not travel to any other countries.
 Their first performance was broadcast on the Canadian Broadcasting Corporation in 1943, and they remained together for 15 years.
 During this time, Parlow remained the head of the quartet, but the other performers were occasionally replaced.

As Parlow's career began to decline, her financial situation became progressively worse, and Godfrey Ridout and other friends of hers established a fund to support her.
 In October 1959, she was appointed head of the College of Music of the University of Western Ontario, which provided much needed income.
 She died on August 19, 1963, and her will set up the Kathleen Parlow Scholarship for stringed instrument players at the University of Toronto, with the money from her estate and $40,000 from the sale of her violin.

A biography written by her cousin, Maida Parlow French, appeared in 1967.
With her concert career not particularly profitable, Parlow looked for other career options.  In 1929, she was appointed to the faculty of Mills College in Oakland, California.  She received an honorary Master of Arts degree from Mills College in 1933.  While at Mills College she began to play in string quartets, in which she played violin, and in 1935 she formed the South Mountain Parlow Quartet.
In 1936, Parlow accepted a position at the Juilliard School of Music.  She remained there until World War II, when she returned to Canada and gave a series of lecture-recitals at the Royal Conservatory of Music in Toronto.  She wrote to Sir Ernest MacMillan about a permanent position with the Royal Conservatory of Music, and obtained one in 1941.  While there, she was a teacher for the singer Gisèle LaFleche, violinist Ivan Romanoff, and the conductor Victor Feldbrill.
She became a regular performer with the Toronto Symphony Orchestra as well, bringing additional income.  In Toronto, she organised the Canadian Trio, which she performed in with Zara Nelsova playing the cello, and Sir Ernest MacMillan playing piano.  The trio debuted with a performance of Schubert's Trio in B-flat Major, and Haydn's Trio in A Major and Tchaikovsky's Trio in A minor.  They received excellent reviews and the trio continued performing across southern Ontario, as well as on radio, until 1944.
The Canadian Trio was earning as much as $750 per performance.  Inspired by this success, Parlow started her third string quartet in 1942, called the Parlow String Quartet.  The quartet also included Isaac Mamott on cello, Samuel Hersenhoren as second violin and violist John Dembeck.  Parlow did all the administrative work for the quartet.  The quartet gave concerts in Canada, both live and on radio, but did not travel to any other countries.  Their first performance was broadcast on the Canadian Broadcasting Corporation in 1943, and they remained together for 15 years.  During this time, Parlow remained the head of the quartet, but the other performers were occasionally replaced.
As Parlow's career began to decline, her financial situation became progressively worse, and Godfrey Ridout and other friends of hers established a fund to support her.  In October 1959, she was appointed head of the College of Music of the University of Western Ontario, which provided much needed income.  She died on August 19, 1963, and her will set up the Kathleen Parlow Scholarship for stringed instrument players at the University of Toronto, with the money from her estate and $40,000 from the sale of her violin.
A biography written by her cousin, Maida Parlow French, appeared in 1967.
Kathleen Parlow